We've talked about snails（蜗牛）and their slow move.But much of the time snails don't move at all.They're in their shells（壳）—sleeping.

    Hot sun will dry out a snail's body.So at the least sign of hot sun,a snail draws its body into its shell and closes the opening with a thin cover.Then it goes to sleep.A snail will die in a heavy rain.So whenever it rains,it goes inside its shell house and goes to sleep.A snail can sleep for as long as it needs to.It can take a short sleep.Or it can sleep for days at a time.And it spends all the winter months in its shell,asleep.

    the shell.When hungry,the snail looks for food.It can't see very well.Its eyes,at the ends of the top feelers（触角）are very weak.But its sense of smell is very strong.It helps the snail to the new greens.Then the snail's little mouth goes to work.

    A snail's mouth is no longer than the point of a pin（针）.Yet it has 256,000 teeth!The teeth are so small that you can't see them.But they do their work.If you put a snail in a hard paper box,it will eat its way out.And if a snail wears out its teeth,it will grow new ones.

    Mostly,a snail looks for food at night.But on cloudy days it eats in the day time.It cats all day long.A snail can go on eating for hours and never feel full.

    In business, there's a speed difference: It's the difference between how important a firm's leaders say speed is to their competitive strategy and how fast the company actually moves. The difference is important regardless of industry and company size. Companies fearful of losing their competitive advantage spend much time and money looking for ways to pick up the speed.

In our study of 343 businesses, the companies that chose to go, go, go to try to gain an edge ended up with lower sales and operating incomes than those that paused at key moments to make sure they were on the right track. What's more, the firms that “slowed down to speed up” improved their top and bottom lines, averaging 40% higher sales and 52% higher operating incomes over a three-year period.

    How did they disobey the laws of business physics, taking more time than competitors yet performing better? They thought differently about what “slower” and “faster” mean. Firms sometimes fail to understand the difference between operational speed (moving quickly) and strategic speed (reducing the time it takes to deliver value). Simply increasing the speed of production, for example, may be one way to try to reduce the speed difference. But that often leads to reduced value over time, in the form of lower-quality products and services.

    In our study, higher-companies with strategic speed always made changes when necessary. They became more open to ideas and discussion. They encouraged new ways of thinking. And they allowed time to look back and learn. By contrast, performance suffered at firms that moved fast all the time, paid too much attention to improving efficiency, stuck to tested methods, didn't develop team spirit among their employees, and had little time thinking about changes.

    Strategic speed serves as a kind of leadership. Teams that regularly take time to get things right, rather than plough ahead full bore, are more successful in meeting their business goals. That kind of strategy must come from the top.

    The end of the school year is in sight — Christmas cards, candy canes and of course, end of year reports.

    While most parents welcome an assessment of their kids' performance, they do not expect their own input to be evaluated. But a school in the UK is changing that. As well as assessing their students, they are dishing out grades to mums and dads. Parents that are really involved in their kid's education are rewarded with an A, and parents that haven't done their bit get a disappointing D.

    The school, Greasley Beauvale Primary in Nottinghamshire, uses criteria such as whether mums and dads have attended school events such as plays and parent-teacher conferences to decide on the grade. The school's principal, Donna Chambers, said that the scheme (方案)had been well received.

    “There were some critics, but my response was 'well, it can't do any harm'. Between 15 percent and 20 percent of parents started out in the lower categories but now that has been reduced to just two percent,” she explained.

    Chambers hopes that the scheme will help motivate parental involvement. “The system is important because you have got to get the parents on board from day one. That one hour initial conversation saying they could improve will pay dividends for the rest of that child's academic life”, she said.

    But while the scheme may be well-intentioned, it is likely to be connected with parent shaming. There are lots of reasons why some mums and dads might not be involved in school activities such as work commitments, looking after younger children or caring for elderly relatives.

    And of course, being involved in your kid's education doesn't begin and end at school. There is a lot that goes on behind the scenes from helping with homework to keeping uniforms freshly laundered. And what about all the parents who stayed up sewing special costumes at the last minute? Surely that earns a gold star instead of a grade!

    Samuel Osmond is a 19-year-old law student from Cornwall, England. He never studied the piano. However, he can play very difficult musical pieces by musicians such as Chopin and Beethoven just a few minutes after he hears them. He learns a piece of music by listening to it in parts. Then he thinks about the notes(音符) in his head. Two years ago, he played his first piece Moonlight Sonata（奏鸣曲）by Beethoven. He surprised everyone around him.

    Amazed that he remembered this long and difficult piece of music and played it perfectly, his teachers say Samuel is unbelievable. They say his ability is very rare, but Samuel doesn't even realize that what he can do is special. Samuel wanted to become a lawyer as it was the wish of his parents, but music teachers told him he should study music instead. Now, he studies law and music.

Samuel can't understand why everyone is so surprised. "I grew up with music. My mother played the piano and my father played the guitar. About two years ago, I suddenly decided to start playing the piano, without being able to read music and without having any lessons. It comes easily to me —I hear the notes and can bear them in mind—each and every note," says Samuel.

Recently, Samuel performed a piece during a special event at his college. The piece had more than a thousand notes. The audience was impressed by his amazing performance. He is now learning a piece that is so difficult that many professional(专业的) pianists can't play it. Samuel says confidently, "It's all about super memory—I guess I have that gift."

    However, Samuel's ability to remember things doesn't stop with music. His family says that even when he was a young boy, Samuel heard someone read a story, and then he could retell the story word for word.

    Samuel is still only a teenager. He doesn't know what he wants to do in the future. For now, he is just happy to play beautiful music and continue his studies.

    It is increasingly popular for Chinese young people to share their experiences on Social media, such as the “moments” (朋友圈) on popular instant messaging service WeChat.

    “I have been reading 'Jane Eyre' for 40 days with 48,000 words finished,” Li Anqi said. Li has been sharing her reading experience on WeChat moments every day since January. Working in Yinchuan, capital of Northwest China's Ningxia, Li wants to learn English very much, but cannot bare (摆脱) the daily grind (日常工作) of school lessons.

    “I found many of my WeChat friends had been reading books or learning English on mobile reading apps, and I did not want to fall behind,” Li said.

    In January, she spent more than 100 yuan purchasing an online reading class at the Bohe Reading app, which tells customers they can: “Finish reading your first English book here.” At the reading class, teachers assign reading homework and give instructions to 430 class members every day.

    A survey report released (发布) on Thursday said 70.9 percent of primary and middle students in China use the Wechat instant messaging App. At the same time, 75.9 percent of Chinese children have their own mobile phones, according to China National Children's Center.

    The figures were based on a survey of nearly 9,000 children across China. However, 28.8 percent of them never read news online and 43.2 percent have never touched newspapers.

    The Center called for efforts to address the digital divide between urban and rural education and protect children's privacy as Internet users.

    What are two things that make humans different from animals? One is language, and the other is music. It is true that some animals can sing (and many birds sing. better than a lot of people). However, the songs of animals, such as birds and whales, are very limited. It is also true that humans, not animals, have developed musical instruments.

    Music is strange stuff. It is clearly different from language. However, people can use music to communicate things—especially their emotions. When music is combined with speech in a song, it is a very powerful form of communication.

    If music is truly different from speech, then we should process music and language in different parts of the brain. The scientific evidence suggests that this is true. Sometimes people who suffer brain damage lose their ability to process language. However, they don't automatically lose their musical abilities. For example, Vissarion Shebalin, a Russian composer, had a stroke in 1953. It injured the left side of his brain. He could no longer speak or understand speech. He could, however, still compose music until his death ten years later. On the other hand, sometimes strokes cause people to lose their musical ability, but they can still speak and understand speech.

    Why does music have such a strong effect on us? That is a harder question to answer. Geoffrey Miller, a researcher at University College, London, thinks that music and love have a strong connection. Music requires special talent, practice, and physical ability. That's why it may be a way of showing your fitness to be someone's mate. For example, singing in tune or playing a musical instrument requires fine muscular control. You also need a good memory to remember the notes. And playing or singing those notes correctly suggests that your hearing is in excellent condition. Finally, when a man sings to the woman he loves, it may be a way of showing off.

    However, Miller's theory still doesn't explain why certain combinations of sounds influence our emotions so deeply. For scientists, this is clearly an area that needs further research of sounds influence our emotions so deeply. For scientists, this is clearly an area that needs further research.