Do you often carry maps when you travel to other countries? Maps can show you the right ways. But if you don’t bring maps with you, what should you do? I’m afraid that you need to ask the way. Here are some tips(建议) for you, because there are different ways to give ways in the world.

In Japan, most streets don’t have their street names. The Japanese use landmarks(路标) to give ways. So when you ask, “Excuse me, could you tell me how to get to the nearest post office?” They often say, “Go along the road, turn left on the second street and go past a supermarket. The post office is opposite the hospital.”

In the countryside of the American midwest. The land is very flat(平坦的). So if you have the same question, people will say to you, “Go east 3 kilometers, turn north and then walk another kilometer.” But in Los Angeles and California, people measure distance(测量距离) by time, not meters. So when you ask, “How far is the nearest post office?”, they will tell you, “It’s about 10 minutes’ walk from here”.

People in Greece often use body language to help you. They will use their hands to show the right or left ways, or they will simply say, “follow me.” Because they can’t speak English and the tourists couldn’t understand the language there.

2 . Grown-ups are often surprised by how well they remember something they learned as children but have never practiced ever since. A man who has not had a chance to go swimming for years can still swim as well as ever when he gets back in the water. He can get on a bicycle after many years and still ride away. He can play catch and hit a ball as well as his son. A mother who has not thought about the words for years can teach her daughter the poem that begins “Twinkle, twinkle, little star” or remember the story of Cinderella or Goldilocks and the Three Bears.

One explanation is the law of overlearning, which can be stated as follows：Once we have learned something, additional learning trials（尝试）increase the length of time we will remember it.

In childhood we usually continue to practice such skills as swimming, bicycle riding, and playing baseball long after we have learned them. We continue to listen to and remind ourselves of words such as “Twinkle, little star” and childhood tales such as Cinderella and Goldilocks. We not only learn but overlearn.

The multiplication tables（乘法口诀表）are an exception to the general rule that we forget rather quickly the things that we learn in school, because they are another of the things we overlearn in childhood.

The law of overlearning explains why cramming（突击学习）for an examination, though it may result in a passing grade, is not a satisfactory way to learn a college course. By cramming, a student may learn the subject well enough to get by on the examination, but he is likely soon to forget almost everything he learned. A little overlearning, on the other hand, is really necessary for one’s future development.

In English, feeling “blue” makes people think of feeling sad. But in 2021, the word “blue” could be connected to something more hopeful.

The Pantone Color Research Center in the US leads color trends every year. For 2021, it has chosen “classic blue”, a color that reminds people of the sky before night. The reason is that it brings “calm, confidence and connection,” according to Pantone.

In 2020, people all over the world face big challenges, weather change, COVID-19, homelessness.... all of these problems make us feel nervous and worried. But as Pantone President Laurie Pressman said, “The color of classic blue always brings something relaxing.”

Imagine that you are lying down on the ground and looking at the evening sky. Looking at the dark blue sky will make you feel calm and relaxed, as well as make you think on a deeper level.

Pantone said that classic blue connects people everywhere as we all look up at our shared sky. This is a color we can be connected to around the world, no matter where we live. We look outside the door and we see this color, Pressman said.

Classic blue also plays into the sustainability movement, as people think of times when things were simpler and more comfortable.

“Like blue jeans, it’s always there and you’re comfortable with it,” said Pressman, who thinks classic blue is timeless and never out of style. If the color is always in style, people won’t throw “classic blue” things away. We can buy fewer products and save more resources.

So if you want to add some new things, choose something blue to keep up with the latest trend.

December 27, 2019 was an exciting day for Chinese people. China’s biggest and most powerful rocket, the Long March 5, was successfully launched in Hainan on that day.

The 57-meter-tall rocket is the tallest and strongest rocket in China. Since the Long March 5 is much bigger than others in the Long March rockets, it has been nicknamed “Chubby 5”, according to China Daily.

The rocket is able to carry things weighing up to 25,000 kilograms-the weight of 16 midsize cars, China Daily noted. This payload is about 2.5 times greater than any other Chinese rocket. The Long March 5 is the third most powerful rocket in the world. Our Chinese scientists are really proud of it.

During the December launch, the Long March 5 successfully sent the Shijian 20th satellite, China’s largest and heaviest home-made satellite, into space. In addition to sending the satellite into space, the launch also tested several projects that were used to improve the rocket’s basic skills. It also tested the key project that will be used to take the Change 5 probe to the moon, according to the China National Space Center.

In the future, the Long March 5 will be used for China’s fifth lunar expedition, as well as to place parts of China’s space-station into space. “In 2021, we will use the Long March 5 to launch the Change’s 5 probe to the moon and also send a special probe to Mars,” said Wang Xiaojun, the project manager of the Long March 5.

Heart disease is one of the major killers in the world today. Many who suffer from it must have heart transplants. However, it’s difficult to get a suitable heart donation, and even if a patient survives the wait, his or her body often rejects the heart.

But there is now new hope for sufferers of heart disease. According to a study published in the journal Advanced Science, researchers from Israel’s Tel Aviv University printed a 3D human heart on April 15.

“This is the first time anyone anywhere has successfully engineered and printed an entire heart,” Professor Tal Dvir told CNN.

Unlike the previous 3D-printed heart structure, the new heart is complete with cells, blood vessels, chambers and other structures a heart needs to function normally. But scientists still have more to figure out before the 3D-printed heart can be fitted into the body. For one thing, the experimental heart is only the size of a thumb. And, although it can contract like a muscle, it cannot pump out blood like a real one. At present, the heart prototype is like a tiny airplane that has all of the right parts, but can’t fly.

However, the development is still regarded as a major breakthrough in medicine.

In the experiment, the researchers turned human fat tissue into human heart tissue with stem cell technology. The tissue was then turned into “bio-ink” for a 3D printer to ensure that tissue in the heart came from the patients themselves. So ideally, if it were to be placed in the body of someone in need of a transplant, there would be less risk of organ rejection.

“Patients will no longer have to wait for transplants or take medications to prevent their rejection,” researchers told USA Today. “Instead, the needed heart will be printed, fully personalized for every patient.”

But the scientists think that 3D printing can be used to create other human organs. They foresee a time when the 3D printing of organs will be an everyday medical practice.

“Maybe, in 10 years, there will be organ printers in the finest hospitals around the world and these procedures will be conducted routinely” Dvir said.

9 . In a rainforest there are tall trees. The top of these trees is called the canopy. Scientists want to learn about the canopy. They want to learn about everything that lives there. But it has not been easy to get to the canopy.

Meg is an American biologist, explorer, writer, and public speaker. Since she knows a lot about trees, she is sometimes called Canopy Meg. Meg has always liked trees. When she was a child, she made tree houses. Now, she has climbed to the top of trees all over the world and does great research, so she has got a nickname called “Einstein of the treetops.”

Walkways in the rainforest were Meg’s idea. Now, they are used by many people. A walkway is like a bridge that goes between the trees. It is safe and it doesn’t harm the trees. A walkway, however, cannot help scientists reach the top.

One way to reach the top is by a light raft filled with air. It has a huge net on it. A hot air balloon drops the raft onto the trees. Scientists can stand on the raft and look into the trees.

A tower crane is also a good way to get to the top. It can go above the tree tops. It can go all the way down to the ground, too. Scientists are learning about life in the canopy. They have learned there are millions of insects that are eating leaves in these treetops.

Meg’s job is to keep finding out more. She wants to help find the secrets of treetops. There are still millions of animals that no one has seen. Many of them are in the treetops.

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10 . We’ll finally grow up someday, leaving our parents and facing the challenges in life. Parents may not be able to solve every problem for us. Instead, we should have enough life skills to deal with the problems that come our way.

This is what our country tries to do now: Helping more students get working spirit. To stress the importance of hardworking spirit education among students of different ages, the Communist Party of China Central Committee and the State Council released a guideline in March.

The guideline calls for students to respect work. Students should learn basic life skills and form good working habits through such education.

The government has been trying to stress the importance of hardworking spirit education. But this has been overlooked in recent years. Many teens do not value the importance of working hard and are uninterested in doing so.

According to a study of nearly 3,000 students that was done by Ningbo Evening News in March, only 22 percent of primary and middle school students help with everyday chores around the house.

Schools and families play an important role in teaching students about the value of hard, the guideline says.

Primary and middle schools should provide students with hardworking spirit classes every week, according to the guideline says. Schools can also hold activities to give students real- world work experience. For example, schools can teach children how to plant trees on Tree-Planting Day.

As children’s first teachers, parents should also encourage children to learn how to do chores at home. Students should master one or two life skills every year. These skills can include cooking, washing the own clothes and tidying their rooms.