【推荐1】As cultural symbols go, the American car is quite young. The Model T Ford was built at the Piquette Plant in Michigan a century ago, with the first rolling off the assembly line (装配线) on September 27, 1908. Only eleven cars were produced the next month. But eventually Henry Ford would build fifteen million of them.

Modern America was born on the road, behind a wheel. The car shaped some of the most lasting aspects of American culture: the roadside diner, the billboard, the motel, even the hamburger. For most of the last century, the car represented what it meant to be American—going forward at high speed to find new worlds. The road novel, the road movie, these are the most typical American ideas, born of abundant petrol, cheap cars and a never-ending interstate highway system, the largest public works project in history.

In 1928 Herbert Hoover imagined an America with “a chicken in every pot and a car in every garage.” Since then, this society has moved onward, never looking back, as the car transformed America from a farm-based society into an industrial

The cars that drove the American Dream have helped to create a global ecological disaster. In America the demand for oil has grown by 22 percent since 1990.

The problems of excessive (过度的) energy consumption, climate change and population growth have been described in a book by the American writer Thomas L. Friedman. He fears the worst, but hopes for the best.

Friedman points out that the green economy (经济) is a chance to keep American strength. “The ability to design, build and export green technologies for producing clean water, clean air and healthy and abundant food is going to be the currency of power in the new century.”

What has the use of cars in America led to?

【推荐2】As cultural symbols go, the American car is quite young. The Model T Ford was built at the Piquette Plant in Michigan a century ago, with the first rolling off the assembly line (装配线) on September 27, 1908. Only eleven cars were produced the next month. But eventually Henry Ford would build fifteen million of them.

Modern America was born on the road, behind a wheel. The car shaped some of the most lasting aspects of American culture: the roadside diner, the billboard, the motel, even the hamburger. For most of the last century, the car represented what it meant to be American—going forward at high speed to find new worlds. The road novel, the road movie, these are the most typical American ideas, born of abundant petrol, cheap cars and a never-ending interstate highway system, the largest public works project in history.

In 1928 Herbert Hoover imagined an America with “a chicken in every pot and a car in every garage.” Since then, this society has moved onward, never looking back, as the car transformed America from a farm-based society into an industrial

The cars that drove the American Dream have helped to create a global ecological disaster. In America the demand for oil has grown by 22 percent since 1990.

The problems of excessive (过度的) energy consumption, climate change and population growth have been described in a book by the American writer Thomas L. Friedman. He fears the worst, but hopes for the best.

Friedman points out that the green economy (经济) is a chance to keep American strength. “The ability to design, build and export green technologies for producing clean water, clean air and healthy and abundant food is going to be the currency of power in the new century.”

【推荐3】As data and identity theft becomes more and more common, the market is growing for biometric(生物测量) technologies—like fingerprint scans—to keep others out of private e-spaces. At present, these technologies are still expensive, though.

Researchers from Georgia Tech say that they have come up with a low-cost device(装置) that gets around this problem: a smart keyboard. This smart keyboard precisely measures the cadence(节奏) with which one types and the pressure fingers apply to each key. The keyboard could offer a strong layer of security by analyzing things like the force of a user’s typing and the time between key presses. These patterns are unique to each person. Thus, the keyboard can determine people’s identities, and by extension, whether they should be given access to the computer it’s connected to—regardless of whether someone gets the password right.

It also doesn’t require a new type of technology that people aren’t already familiar with. Everybody uses a keyboard and everybody types differently.

In a study describing the technology, the researchers had 100 volunteers type the word “touch” four times using the smart keyboard. Data collected from the device could be used to recognize different participants based on how they typed, with very low error rates. The researchers say that the keyboard should be pretty straightforward to commercialize and is mostly made of inexpensive, plastic-like parts. The team hopes to make it to market in the near future.

Where is this text most likely from?

【推荐1】About thirty years ago, Switzerland-based artist Klaus Littmann came across a great drawing titled The Unending Attraction of Nature by Austrian artist and architect Max Peintner. The drawing displays a scene in which nature is so separate (分开的) from the environment that it becomes just a small area of ground, protected for amusement.

“When I first saw the pencil drawing, I was interested. I knew that one day this work would be the starting point for a major art project in public space,” says Littmann. Now, decades later, Littmann has achieved the vision with the installation (大型艺术作品) of FOR FOREST: The Unending Attraction of Nature. The installation sets a native central European forest in the middle of Worthersee Football Stadium in Klagenfurt, with almost 300 trees planted, some weighing up to six tons each.

In the face of climate crisis and deforestation, FOR FOREST comes with a more pressing urgency. As explained in a statement about the installation, “In support of today’s most pressing issues about climate change and deforestation, FOR FOREST aims to challenge our perception of nature and question its future. It reminds us that nature may someday only be found in special places, as is already the case with animals in zoos.”

Overseen by Enea Landscape Architecture, the forest is made up of a diverse range of species. This attracting panorama (全景) will pave the way for a whole new view and understanding of forests.

In a short video about the work, Littmann says his goal is never to make something that will last forever; rather, he says, “My goal is for this picture to remain in people’s head for a lifetime.”

【推荐2】California has lost half its big trees since the 1930s, according to a study to be published Tuesday and climate change seems to be a major factor(因素).

The number of trees larger than two feet across has declined by 50 percent on more than 46, 000 square miles of California forests, the new study finds. No area was spared or unaffected, from the foggy northern coast to the Sierra Nevada Mountains to the San Gabriels above Los Angeles. In the Sierra high country, the number of big trees has fallen by more than 55 percent; in parts of southern California the decline was nearly 75 percent.

Many factors contributed to the decline, said Patrick McIntyre, an ecologist who was the lead author of the study. Woodcutters targeted big trees. Housing development pushed into the woods. Aggressive wildfire control has left California forests crowded with small trees that compete with big trees for resources(资源).

But in comparing a study of California forests done in the 1920s and 1930s with another one between 2001 and 2010, McIntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from woodcutting or development.

The loss of big trees was greatest in areas where trees had suffered the greatest water shortage. The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed, taking into account such things as rainfall, air temperature, dampness of soil, and the timing of snowmelt(融雪).

Since the 1930s, McIntyre said, the biggest factors driving up water stress in the state have been rising temperatures, which cause trees to lose more water to the air, and earlier snowmelt, which reduces the water supply available to trees during the dry season.

【推荐1】Monkeys seem to have a way with numbers.

A team of researchers trained three Rhesus monkeys to associate 26 clearly different symbols consisting of numbers and selective letters with 0-25 drops of water or juice as a reward. The researchers then tested how the monkeys combined—or added—the symbols to get the reward.

Here’s how Harvard Medical School scientist Margaret Livingstone, who led the team, described the experiment: In their cages the monkeys were provided with touch screens. On one part of the screen, a symbol would appear, and on the other side two symbols inside a circle were shown. For example, the number 7 would flash on one side of the screen and the other end would have 9 and 8. If the monkeys touched the left side of the screen they would be rewarded with seven drops of water or juice; if they went for the circle, they would be rewarded with the sum of the numbers—17 in this example.

After running hundreds of tests, the researchers noted that the monkeys would go for the higher values more than half the time, indicating that they were performing a calculation, not just memorizing the value of each combination.

When the team examined the results of the experiment more closely, they noticed that the monkeys tended to underestimate (低估) a sum compared with a single symbol when the two were close in value—sometimes choosing, for example, a 13 over the sum of 8 and 6. The underestimation was systematic: When adding two numbers, the monkeys always paid attention to the larger of the two, and then added only a fraction (小部分) of the smaller number to it.

“This indicates that there is a certain way quantity is represented in their brains, ”Dr. Livingstone says. “But in this experiment what they’re doing is paying more attention to the big number than the little one.”

【推荐2】The connection between people and plants has long been the subject of scientific research. Recent studies have found positive effects. A study conducted in Youngstown，Ohio，for example, discovered that greener areas of the city experienced less crime. In another, employees were shown to be 15% more productive when their workplaces were decorated with houseplants.

The engineers at the Massachusetts Institute of Technology（MIT）have taken it a step further — changing the actual composition of plants in order to get them to perform diverse, even unusual functions….

One of his latest projects has been to make plants glow（发光）in experiments using some common vegetables. …

In the future, the team hopes to develop a version of the technology that can be sprayed onto plant leaves in a one-off treatment that would last the plant’s lifetime. …

Lighting accounts for about 7% of the total electricity consumed in the US. Since lighting is often far removed from the power source（电源）— such as the distance from a power plant to street lamps on a remote highway — a lot of energy is lost during transmission（传输）. Glowing plants could reduce this distance and therefore help save energy.

【推荐3】The victims were carried in one by one, their paws and fur burned, suffering from dehydration(脱水) and fear. Their caretakers bandaged their wounds, wrapped them and laid them in baskets with the only thing that was familiar — the leaves of a eucalyptus (桉树) tree.

As catastrophic fires have burned more than two million acres in Australia, dozens of koalas have been rescued from burning trees and ashen ground. The animals, already threatened as a species before these latest fires destroyed an essential habitat, are being treated in rescue centers, and at least one private home, along the country’ s east coast.

The difficult situation of the koala—a national symbol of Australia—has raised questions among conservationists and scientists about what it will take to preserve biodiversity in a country increasingly exposed to intense fire, extreme heat and water scarcity, and which already has among the highest rates of species extinction in the world.

While koalas have evolved to exist alongside wildfires, the animals are facing new threats not just from climate change but also from human development, which has dislocated local populations, damaging their ability to survive fires. In some regions, scientists say, koalas’ numbers have declined by up to 80 percent, though it is difficult to know how many remain across Australia.

“We have these unique animals not found anywhere else on this planet, and we’re killing them,” said Cheyne Flanagan, the clinical director of the Koala Hospital, the only facility of its kind in the world. “This is a big wake-up call.”

【推荐1】By day, Robert Titterton is a lawyer. In his spare on stage beside pianist Maria Raspopova — not as a musician but as her page turner. “I’m not a trained musician, but I’ve learnt to read music so I can help Maria in her performance.”

Mr Titterton is chairman of the Omega Ensemble but has been the group’s official page turner for the past four years. His job is to sit beside the pianist and turn the pages of the score so the musician doesn’t have to break the flow of sound by doing it themselves. He said he became just as nervous as those playing instruments on stage.

“A lot of skills are needed for the job. You have to make sure you don’t turn two pages at once and make sure you find the repeats in the music when you have to go back to the right spot.” Mr Titterton explained.

【推荐2】“You can use me as a last resort(选择), and if nobody else volunteers，then I will do it.” This was an actual reply from a parent after I put out a request for volunteers for my kids lacrosse(长曲棍球)club.

I guess that there's probably some demanding work schedule, or social anxiety around stepping up to help for an unknown sport. She may just need a little persuading. So I try again and tug at the heartstrings. I mention the single parent with four kids running the show and I talk about the dad coaching a team that his kids aren’t even on … At this point the unwilling parent speaks up,“Alright. Yes, I’ll do it.”

I’m secretly relieved because I know there’s real power in sharing volunteer responsibilities among many. The unwilling parent organizes the meal schedule, sends out emails, and collects money for end-of-season gifts. Somewhere along the way, the same parent ends up becoming an invaluable member of the team. The coach is able to focus on the kids while the other parents are relieved to be off the hook for another season. Handing out sliced oranges to bloodthirsty kids can be as exciting as watching your own kid score a goal.

Still, most of us volunteers breathe a sigh of relief when the season comes to a close. That relief is coupled with a deep understanding of why the same people keep coming back for more: Connecting to the community(社区)as you freely give your time, money, skills, or services provides a real joy. Volunteering just feels so good.

In that sense, I’m pretty sure volunteering is more of a selfish act than I’d freely like to admit. However, if others benefit in the process, and I get some reward too, does it really matter where my motivation lies?

What can we infer about the parent from her reply in paragraph l？