The Google Brain team has been working on computing systems called “neural networks”—systems that were designed based on how neurons work in the human brain.
This time, they gave a mission to three of the neural networks, which they named Alice, Bob and Eve. Each of the networks had its own job—Alice sent messages to Bob, Eve tried to “eavesdrop”(偷听) and find out the messages, and Alice and Bob had to figure out a way to hide the messages from Eve. All the help that Alice and Bob got from the researchers before the mission began was made up of a set of numbers, which Eve didn’t have access to.
At first, Alice was not very good at sending secret messages. But slowly it worked on a way to encrypt(加密) them—putting information into a special code so that others could not understand it if they got the information—using he numbers given by researchers. And after practice, Bob also came to be able to decrypt(解密) Alice’s messages. Without the numbers or keys, Eve failed to understand Alice’s “speech” most of the time.
This test is considered a big step in the development of computers’ learning skills. “Computing with neural networks on this scale has only become possible in the last few years, so we truly are at the beginning of what’s possible, ” Joe Sturonas of US encryption company PKWARE told New Scientist magazine.
Unfortunately, the test happened only one week after UK physicist Stephen Hawking, While speaking at Cambridge University, warned how AI(artificial intelligence)could develop a will of its own. This could be “either the best or the worst thing ever to happen to human being”, he said.
But just as Sturonas pointed out, no matter what the possibilities of computers are in the future, they are just starting out. We still have plenty of time to work out a solution before they get anywhere near becoming a threat to humanity.
1. For what purpose was the test conducted?A.To study how neurons work in the human brain. |
B.To study how computing systems work and learn. |
C.To find out a more effective way to keep secrets. |
D.To find out a more powerful way to break the codes. |
A.encrypting—messages—code—messages—decrypting |
B.messages—encrypting—code—decrypting—messages |
C.code—messages—encrypt—decrypting—messages |
D.messages—code—decrypting—encrypting—messages |
A.AI must be a blessing. | B.AI should be forbidden. |
C.AI is sure to be a failure. | D.AI is a double-edged sword. |
A.Hopeful. | B.Doubtful. |
C.Puzzled. | D.Panicked. |
相似题推荐
【推荐1】From quiet paths by a stream in a forest to busy roads running through a city, people have created various forms of routes in different places. These now exist all around us, and their use is imperative for societies. These routes have enabled people to move, transport things, and send information from one place to another quickly and safely. Throughout history, they have been important in our daily lives.
Early routes were often formed naturally on land. They gradually developed over long periods of time while people traveled them on foot or horseback. A significant turning point in their history arrived when the first wheeled carts appeared in ancient times. Once this happened, people recognized the importance of well-maintained routes. Therefore, towns, cities, and entire countries improved them. As a result, life became more convenient, communities grew, economies evolved, and cultures expanded.
People have established routes on water, too. Rivers and canals have served as effective routes for people to move around and carry things. For instance, in the old, Japanese city of Edo, water routes were used for the transportation of agricultural products, seafood, and wood. People have also opened routes across the sea. The seaways were critical for the navigation of ships, particularly in the days when they moved mainly by wind power. Using these sea routes, people could travel great distances, and go to places they had not previously been able to reach.
People have gone on to open routes in the sky as well. Since the invention of the airplane, they have made it possible to travel long distances easily. Eventually, people became able to travel safely and comfortably high in the sky, and going vast distances only took a small amount of time.
Today, we have a new type of route, the Internet. By using this worldwide route, people can easily obtain information that once was available mainly from books and face-to-face communication. They can also instantly send messages to large numbers of people all at once.
As long as there have been people, there have been routes to connect them. Currently unknown routes will surely take us even further in the future.
1. Which of the following is closest to the meaning of the underlined word imperative in paragraph 1?A.accidental | B.industrial |
C.essential | D.traditional |
A.To describe the difficulty of creating routes on the water. |
B.To emphasize the fact that it was an important city. |
C.To explain the use of water routes to move along the coastlines. |
D.To illustrate the important roles of water routes for cities. |
A.Routes can be thought of as existing invisibly in the world. |
B.Routes that move information can be regarded as dangerous. |
C.The fundamental functions of routes are declining. |
D.The importance of different kinds of routes is the same. |
A.Humankind first created various types of convenient routes on land. |
B.Improvements in transportation have come at great cost. |
C.Technology has interfered with opening up routes around the world. |
D.The advancement of humanity was aided by the development of routes. |
【推荐2】As I enter my 40s, I’ve noticed many of my parents’ generation think social networking is something they are simply unable to understand. They fear that, should they try, they will somehow get it wrong; they will say the wrong thing, do the wrong thing or behave in a way that causes embarrassment. But there are some secrets of social media for them to consider.
Here’s the first secret: everyone feels this way. I recently met a young actor who was complaining that her work demands that she join Microblog, but she always feels like she doesn’t have anything smart to say. It’s the same resistance (抵制). I hear from the older generation, who, however, have somehow believed that age is the barrier (障碍), rather than the differences of personal taste.
Here’s the second secret: everybody uses it for more or less the same reasons. Older generations often sign up to stay in touch with children and relatives. We talk about this kind of communication like it’s some old-fashioned activity, but it is exactly why younger people use social media. The truth is that most people use social media to gently keep an eye on one another, to see how those they care about are doing without needing to ring them up on the phone every night.
And this is the last secret: everyone gets to use them in their own way. Newcomers—younger and older—who worry about “getting it right” are thinking that there’s a right way to get them. But actually there isn’t. Personally, I talk a lot on Microblog. And some people post nothing and they use social media every day as readers. Social media companies would rather see people decorating their networks with pictures and posts, but there’s no rule against being a fly on the wall. It’s also a fine way to get involved.
Were quick to forget that the web wasn’t invented by 13-year-olds; it was created by today’s seniors. I’d never try forcing those with no interest in social networks to use Microblog. But don’t let the talk of age divides put you off. There’s nothing to stop the older generation from joining in the network their own generation created.
1. What’s the author’s purpose of writing this passage?A.To share with us his personal experience using social media. |
B.To explain why the old generation don’t use social media. |
C.To free the old generation from fearing using social media. |
D.To tell us a few secrets of social media that he discovered. |
A.people who prefer reading online books |
B.people who cause trouble to others |
C.people who post many fancy pictures |
D.people who simply observe others’ posts |
A.They believe they may be trapped in embarrassing situations. |
B.They have no particular interest in social networking. |
C.They prefer staying in touch with relatives in real life. |
D.They have no idea which contents to post online. |
A. | B. |
C. | D. |
【推荐3】People around the world used their computers to buy goods,communicate with others,listen to music,see pictures and learn about different places and ideas.In 2006,more people around the world used new ways to communicate and connect with each other through the Internet.
A.The blog is one form of communication that enjoys growing popularity. |
B.People of all ages use computers to express themselves. |
C.It is an online world in which computer users create a new self and live a different life. |
D.Many Websites offer free services to create personal Web pages and fill them with writing site on the web. |
E.There are music videos,and videos made by people in their own homes. |
F.More and more people are buying computers because of the lower price. |
G.It is the most popular social networking site on the web. |
【推荐1】A robot with a sense of touch may one day feel “pain”, both its own physical pain and sympathy for the pain of its human companions. Such touchy-feely robots are still far off, but advances in robotic touch-sensing are bringing that possibility closer to reality.
Sensors set in soft, artificial skin that can detect both a gentle touch and a painful strike have been hooked up to a robot that can then signal emotions, Asada reported February 15 at the annual meeting of the American Association for the Advancement of Science. This artificial “pain nervous system,” as Asada calls it, may be a small building block for a machine that could ultimately experience pain. Such a feeling might also allow a robot to “sympathize” with a human companion’s suffering.
Asada, an engineer at Osaka University, and his colleagues have designed touch sensors that reliably pick up a range of touches. In a robot system named Affetto, a realistic looking child’s head, these touch and pain signals can be converted to emotional facial expressions.
A touch-sensitive, soft material, as opposed to a rigid metal surface, allows richer interactions between a machine and the world, says neuroscientist Kingson Man of the University of Southern California. Artificial skin “allows the possibility of engagement in truly intelligent ways”.
Such a system, Asada says, might ultimately lead to robots that can recognize the pain of others, a valuable skill for robots designed to help care for people in need, the elderly, for instance.
But there is an important distinction between a robot that responds in a predictable way to a painful strike and a robot that’s able to compute an internal feeling accurately, says Damasio, a neuroscientist also at the University of Southern California. A robot with sensors that can detect touch and pain is “along the lines of having a robot, for example, that smiles when you talk to it,” Damasio says. ‘It’s a device for communication of the machine to a human.” While that’s an interesting development, “it’s not the same thing” as a robot designed to compute some sort of internal experience, he says.
1. What do we know about the “pain nervous system”?A.It is named Affetto by scientists. | B.It is a set of complicated sensors. |
C.It is able to signal different emotions. | D.It combines sensors and artificial skin. |
A.Delivered. | B.Translated. | C.Attached. | D.Adapted. |
A.Robots can smile when talked to. |
B.Robots can talk to human beings. |
C.Robots can compute internal feelings |
D.Robots can detect pains and respond accordingly. |
A.Machines Become Emotional | B.Robots Inch to Feeling Pain |
C.Human Feelings Can Be Felt | D.New Devices Touch Your Heart |
【推荐2】There was great excitement on the planet of Venus (金星) this week. For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs.
The satellite was directed into an area known as Manhattan (曼哈顿). Because of excellent weather conditions and extremely strong signals, Venusian scientists were able to get valuable information about the feasibility of a manned flying saucer (飞碟) landing on Earth. A press conference was held at the Venus Institute of Technology.
“We have come to the conclusion, based on last week's satellite landing,” Professor Zog said, “that there is no life on Earth."
“How do you know this?” the science reporter of the Venus Evening News asked.
"For one thing, Earth's surface in the area of Manhattan consists of solid concrete (混凝土) and nothing can grow there. For another, the atmosphere is filled with carbon monoxide (一氧化碳) and other deadly gases and nobody could possibly breathe this air and survive.”
“Are there any other sources of danger that you have discovered in your studies?”
“Take a look at this photo. You see this dark black cloud staying over the surface of Earth? We don't know what it is made of, but it could give us a lot of trouble and we shall have to make further tests before we send a Venus Being there. Over here you will notice what seems to be a river, but the satellite findings indicates it is polluted and the water is unfit to drink.”
“Sir, what are all those tiny black spots on the photographs?”
“We’re not certain. They seem to be metal objects that moves along certain roads. They give out gases, make noise and keep crashing into each other.”
“Professor Zog, why are we spending billions and billions of Zilches to land a flying saucer on Earth when there is no life there?”
“Because if we Venusians can learn to breathe in the Earth atmosphere, then we can live anywhere.”
1. What does the underlined word “feasibility” in Paragraph 2 mean?A.possibility | B.ability | C.simplicity | D.responsibility |
A.Air pollution. |
B.Water pollution. |
C.Heavy traffic. |
D.Over population. |
A.To tell us a dream of Venusian scientists. |
B.To show the secret of life on other planets. |
C.To persuade people to try living on the earth. |
D.To remind people on the earth of some problems. |
【推荐3】There’s a good chance something you've bought online has been in the hands of a “ picker” first. These are the workers in warehouses(仓库)who pick, pack and ship all those things we’re ordering.
At Amazon and other companies, they’re working side by side with robots. Experts say while the robots are replacing some human workers, the machines aren't quite ready to take over completely.
When a robot finds its storage unit, it slides underneath, lifts it up and then delivers it to a worker 一 they’re called pickers. On a recent day, the computer told a picker to grab what looked like a fantasy board (棋盘)game. The picker found it, canned it and placed it on the conveyor belt.
“In a traditional fulfillment center where the associate would walk to the different items , it can take hours to fulfill a customer order. “ Robinson says.
Now, with the help of robots, that task takes minutes 一 and fewer humans.
So is this a sign we're entering a new industrial revolution?
“It’s definitely going to take over a lot of jobs. " says Karen Myers, a scientist at SRI, one of Silicon Valley's oldest research centers.
At the same time, she says, we're running against the limits of technology. Take “the picker” at the Amazon fulfillment center. Myers says those skills are proving to be uniquely human.
“Our fingers are incredibly flexible and the current generation of robotic operators, they’re getting much, much better,” she says. “But they're just not quite there yet. ”
There’s also the robot’s brain.
Remember that board game the Amazon worker was looking for? She could barely see the box filled into the storage bin — but she could tell it was a board game. Robots can’t do that.
Technologists say that, increasingly, humans will work side by side with robots — instead of robots working alone.
Amazon says robots and humans enabled the Tracy warehouse to fulfill customer orders faster. That means more customers and more human workers.
1. A picker does some tasks except .A.picking goods | B.producing goods | C.spotting goods | D.packing goods |
A.more efficient | B.less straight | C.more difficult | D.less profitable |
A.powerful | B.artificial | C.flexible | D.energetic |
A.Robots replacing humans completely. |
B.The advantages of shopping online. |
C.The future of robots. |
D.Robots and humans working side by side. |
【推荐1】In March 2020, as the snowstorm held steady, David Hockney released a painting of bright yellow daffodils (黄水仙) titled “Do Remember They Can’t Cancel the Spring”. In the midst of such depression, it offered a burst of optimism, reminding us that nature, with rebirth and renewal, could still offer hope.
Hockney has long appreciated the natural world. “We can only refresh ourselves by looking at nature,” he has said. A mere 20 minutes in a natural environment has been proven to lower stress levels. Even looking at paintings of nature can produce the same effect, so it is no surprise that visitors have been crowding into Hockney-Van Gogh: The Joy of Nature at The Museum of Fine Arts. “The freeze brought everything to a pause and people’s faces just light up when they walk into the museum,” says Ann Dumas, planner of the Houston show.
The exhibition explores the two artists’ response to nature as well as Van Gogh’s obvious influence on Hockney. The response to nature for both artists was influenced by a switch of scene. When Van Gogh moved to France, he made the colour breakthroughs that led to the vividly coloured landscapes. Similarly, Hockney’s return to Yorkshire gave him a renewed appreciation for the local landscapes that he has depicted (刻画) in his own unique colors.
Hockney has said: “I’ve always found the world quite beautiful. And there’s an important thing I share with Vincent Van Gogh: we both really, really enjoy looking at the world.” Perhaps unsurprisingly their themes frequently overlaps (交叠), “We have a beautiful painting by Van Gogh of some tree trunks: he seems to be lying on the ground and in front of him is a great carpet of wildflowers,” says Dumas. Hockney explored the same theme in his The Arrival of Spring in Woldgate, East Yorkshire, 2011, in which “all the wildflowers are really lively”. says Dumas. The painting, with its thick greens and branches tipped with leaves, is one of the highlights of the show. “People are spellbound.” says Dumas, “They see it very much as about hope.”
1. What effect would “Do Remember They Can’t Cancel the Spring” have on viewers?A.Thrilling. | B.Disturbing. | C.Shocking. | D.Inspiring. |
A.Because paintings of nature help to reduce pressure. |
B.Because Van Gogh’s masterpieces are on show. |
C.Because the freeze outside is unbearable. |
D.Because visitors tend to follow the crowd. |
A.They were deeply influenced by others. |
B.They were good at painting tree trunks. |
C.They found the world quite beautiful. |
D.They reacted actively to nature with the change of scene. |
A.Dumas thinks highly of Hockey. | B.Van Gogh is famous for the Starry Night. |
C.Hockey’s work brings hope to people. | D.Both of the artists enjoy observing the world. |
【推荐2】North and South Koreans face a widening language gap caused by 70 years of separation. That is creating some communication problems for the two countries’ first joint Olympic team as it prepares for 2018 Winter Games in Pyeong Chang. South Korea So, the joint women’s hockey team has created its own dictionary. The three-page document translates important hockey terms from English into South Korean, and then into North Korean.
Canadian Sarah Murray is the team’s coach. She says the document has helped everybody communicate. Team Korea was formed just two weeks ago after the two Koreas decided to suddenly cooperate during the Olympics. Twelve players from North Korea were then added to the 23-member South Korean team.
South Korea has incorporated many English words and phrases into its language. North Korea has removed foreign words and created substitutes from Korean words. To many South Koreans, the substitutes sound funny.
Language experts say about one-third of the everyday words used in the two countries are different. The divide is wider with technical language, like that used for medical and sports industries. For example, South Korean hockey players use the English word “pass,” but their North Korean teammates say “yeol lak” or “communication.” North Koreans say “nahl gay soo”meaning “wing player.” South Koreans call that position “wing,” like in English. South Koreans say “block shot” while North Koreans say “buhduh make ”or “stretching to block.”
Murray admits that there are still some problems in communication even with the new dictionary. She said her South Korean assistant coach plays an important part in bridging the divide. Some in South Korea have criticized the partnership. They argue that the addition of players from North Korea players may prevent South Korean players from playing as much. One early public opinion study found that about 70 percent of South Koreans opposed the joint team.
However, that opposition appears to be lessening as the Olympics near.
1. What factor mainly causes the communication barriers for North and South Joint Hockey Team?A.The team was suddenly formed in a hurry. |
B.They are devoted to preparing the Winter Olympics. |
C.There exists a gap between the two language. |
D.They have been separated from each other for 70 years. |
A.South Korean players are so critical of the joint Olympic team. |
B.There are altogether 35 players in the joint Olympic team. |
C.Murray from Canada doubts the three-page document in their communication. |
D.North Korean assistant coach plays an important role in their communication. |
A.South Korean brings in English words but North Korean created substitutes from Korea |
B.They translate important hockey terms from English into South Korean. |
C.They translate important hockey terms from South Korean into North Korean. |
D.They use English to bridge the language gaps with the help of their own dictionary. |
A.Supportive | B.Negative | C.Objective | D.Subjective |
【推荐3】ON AUGUST 2nd Magdalena Luczak and her partner, Mariusz Krezolek, were jailed for life for the murder of her four-year-old son, Daniel. The pair starved him for months, locked him in a small unheated room, and left him there to die. As with the deaths of Victoria Climbié in 2000 and Peter Connelly in 2007, the boy’s fate has prompted questions about how the authorities missed the abuse (虐待). Attention has again focused on social workers. Recent years have seen numerous attempts to reform and revitalize the profession. In May, a new fast-track training programme, Frontline, was launched in the hope of improving things. It is inspired by Teach First, which sends bright graduates into tough schools for at least two years.
Participants will attend an intensive five-week summer school before taking on two years of closely supervised work in local-authority children’s services. If they measure up, they will qualify as social workers at the end of the first year and gain a master’s degree after the second. Funding will come from private donors, the Department for Education and local authorities. Recruitment(招募)for a pilot scheme, targeting leading universities, begins in September.
Its founders want to boost the status of this profession. “We are dealing with a crisis,” says Lord Adonis, chair of Frontline’s board. Both recruitment and keeping staying on the job are problems: the expected working life of a social worker is eight years, compared with 14 for nurses. Last year some local authorities reported that a third of their positions were unfilled.
Unsurprisingly, given the blame often heaped on the profession, ambitious graduates tend to steer clear. Of the 2,765 people who began master’s courses in social work in 2011, just five had completed undergraduate degrees at Oxford or Cambridge. And too many courses fail to give sufficient practical grounding in hard child-protection work. Frontline recruits will work in small teams with dedicated supervisors in council children’s services.
Reactions to the initiative have been mixed. Some in the profession are angry that it has been set up by outsiders. Boosters, such as Donald Forrester of Bedfordshire University, think the newcomers will bring in much-needed fresh thinking. Another worry is that the programme is too specialized and too short. Focusing just on children’s services is like training doctors only in pediatrics(儿科).
Teach First was set up on the basis that participants would teach first and then go on to other jobs. In fact, over half stay in education. There is no “first” at Frontline. At the end of their course, recruits will be offered the opportunity to pursue further professional training, or encouraged to move up the ranks. But Mr MacAlister hopes that many will stay. This year 9% of all final-year students from Oxbridge applied for Teach First. Frontline hopes to achieve a similar result for social work.
1. The author presents the topic of this article by ______.A.giving cases of child abuse |
B.urging us to care for children |
C.attracting our attention to child abuse |
D.showing concern for the abuse of children |
A.Their training lasts for 8 years. |
B.They are prospective in the future. |
C.They receive little practical grounding. |
D.They should graduate from top universities. |
A.be involved | B.stay away |
C.touch on | D.clear out |
A.A topic which starts heated debates. |
B.An uncertain fate of a much-needed market. |
C.A promising field with strong supporters. |
D.An initiative to revive an unfavorable profession. |
【推荐1】Sit still. It's the rule of every classroom. But that is changing as evidence builds that taking brief activity breaks during the day helps children learn and be more attentive in class, and a growing number of programs designed to promote movement are being adopted in schools. "We need to recognize that children are movement-based," said Brian Gatens, the superintendent of schools in Emerson, N.J." In schools, we sometimes are pushing against human nature in asking them to sit still and be quiet all the time.We fall into this trap that if kids are at their desks with their heads down and are silent and writing, we think they are learning," Mr. Gatens added. "But what we have found is that the active time used to energize your brain makes all those still moments better, or more productive."
A 2013 report from the Institute of Medicine concluded that children who are more active show greater attention, have faster cognitive processing speed and perform better on standardized academic tests than children who are less active. And a study released in January by Lund University in Sweden shows that students, especially boys, who had daily physical education, did better in school.
"Daily physical activity is an opportunity for the average school to become a high-performing school," said Jesper Fritz, a doctoral student at Lund University and physician at the Skane University Hospital in Malmo who was the study's lead author.
"Activity helps the brain in so many ways," said James F.Sallis, a professor of family medicine and public health at the University of California, San Diego, who has done research on the association between activity breaks and classroom behavior."Activity stimulates more blood vessels in the brain to support more brain cells.And there is evidence that active kids do better on standardized tests and pay attention more in school." "Plus," he added," it makes kids want to come to school more-it's fun to do these activities."
But not all districts are embracing the trend of movement breaks. "The bottom line is that with only six and a half hours during the day, our priority is academics," said Tom Hernandez, the director of community relations for the Plainfield School District in Illinois, about 40 miles southwest of Chicago. He said that under state law, the schools provide daily physical education classes and that teachers in the district find ways to give students time during the day to refresh and recharge.
"Kids aren't meant to sit still all day and take in information," said Steve Boyle, one of the co-founders of the National Association of Physical Literacy, which aims to bring movement into schools." Adults aren't either."
1. Brain Gatens is likely to agree thatA.all of the students should sit still |
B.sitting still often means studying well |
C.being quite is actually human nature |
D.always sitting doesn't have good effects |
A.activity helps the brain in only one way |
B.activities can make children physically and mentally healthy |
C.activities have nothing to do with children's academic performances |
D.Daily activity is a chance for the average school to become a high one |
A.they stimulate more blood vessels in the body |
B.they activate all the brain cells but are tough on bodies |
C.they give children fun and motivate all the brains to work |
D.they give students time during the day to refresh and recharge |
A.Discovery |
B.Sports |
C.Education |
D.Science |
【推荐2】Learning is so complex that there are many different psychological theories to explain how people learn. A psychologist named Albert Bandura suggested a social learning theory which shows that observation, imitation (模仿), and modeling play a primary role in this process.
In Albert Bandura’s opinion, people can learn through observation. Observational learning doesn’t even necessarily require watching another person join in an activity. We can also learn by reading, hearing, or watching the actions of characters in books and films. However, just observing someone else’s actions isn’t always enough to lead to learning. Your own mental state also plays an important role in determining whether a behavior is learned or not. In addition, though in many cases, learning can be seen immediately when the new behavior is displayed, yet sometimes we can learn things even though that learning might not be immediately obvious, which means people can learn new information without showing new behaviors.
Not all observed behaviors are effectively learned. Certain requirements need to be related to the observational learning process. For example, you need to be paying attention. Also your retention is an important part of observational learning as you need to pull up information later and act on it during the process. Once you’ve paid attention to the model and kept the information, it’s time to actually perform the behavior you observed. Further practice of the learned behavior leads to improvement. Finally, you have to be motivated to imitate the behavior that has been modeled.
Social learning theory have many real-world applications. For example, researchers employ it to look into and understand ways that positive role models can be used to encourage desirable behaviors. Besides, it’s also applied in the field of education, and today, both teachers and parents recognize how important it is to model appropriate behaviors.
1. What can we infer about observational learning from Paragraph 2?A.Its effects on a person tend to be very obvious. |
B.Its effectiveness is determined by the mental state. |
C.Its most useful means should be careful watching. |
D.It doesn’t necessarily lead to a change in behavior. |
A.Curiosity. | B.Creativity. |
C.Memory. | D.Imagination. |
A.Learn to be judgmental. | B.Look for a motivator. |
C.Try to be imaginative. | D.Focus on the process. |
A.was doubted at first | B.remains to be tested |
C.is of practical use | D.is based on experiments |
【推荐3】Learning a second language is tricky at any age and it only gets tougher the longer you wait to open that dusty French book. Now, in a new study, scientists have pinpointed the exact age at which your chances of reaching fluency in a second language seem to plummet: 10.
The study, published in the journal Cognition, found that it’s “nearly impossible” for language learners to reach native-level fluency if they start learning a second tongue after 10. But that doesn’t seem to be because language skills go downhill. “It turns out you’re still learning fast. It’s just that you run out of time, because your ability to learn starts dropping at around 17 or 18 years old,” says study co-author Joshua Hartshorne, an assistant professor of psychology at Boston College.
Kids may be better than adults at learning new languages for many reasons. Children’s brains are more plastic than those of adults, meaning they’re better able to adapt and respond to new information. “All learning involves the brain changing,” Hartshorne says, “and children’s brains seem to be a lot more skilled at changing.”
Kids may also be more willing to try new things (and to potentially look foolish in the process) than adults are. Their comparatively new grasp on their native tongue may also be advantageous. Unlike adults, who tend to default (默认) to the rules and patterns of their first language, kids may be able to approach a new one with a blank slate (石板).
These findings may seem discouraging, but it was heartening for scientists to learn that the critical period for fluent language acquisition might be longer than they previously thought. Some scientists believed that the brief window closes shortly after birth, while others stretched it only to early adolescence. Compared to those estimates, 17 or 18 — when language learning ability starts to drop off — seems relatively old.
“People fared better when they learned by immersion (沉浸), rather than simply in a classroom. And moving to a place where your desired language is spoken is the best way to learn as an adult. If that’s not an option, you can mimic an immersive environment by finding ways to have conversations with native speakers in their own communities,” Hartshorne says. By doing so, it’s possible to become conversationally proficient — even without the advantage of a child’s brain.
1. The underlined word “plummet” in Paragraph 1 is closest in meaning to “__________”.A.decrease | B.rise |
C.end | D.vary |
A.Children are too young to grasp a second language. |
B.Age 10-18 is the best time to learn a second language. |
C.Adults go beyond the critical period for learning a second language. |
D.Communicating with native speakers enables you to master all the language skills. |
A.Adults are less influenced by their mother tongues. |
B.Adults spend more time responding to new information. |
C.Adults are only too willing to experience something awkward in the process. |
D.Adults prefer an immersive environment to a classroom in learning a second language. |
A.the best age to learn a second language |
B.the approaches to learning a second language |
C.why kids learn a second language more easily than adults |
D.whether adults can learn a second language like their younger selves |