Mobile phones are very popular with people. They are becoming smaller and more convenient.

    Now the scientists in Canada made a smart phone (智能手机)from electronic paper. The Paper Phone is flexible. People can control it by bending it or writing on it with a pen.

    Though the Paper Phone is only millimeters (毫米)thick, people can do many things with it. For example, people can use it to make phone calls, read books, watch movies and play music. So many people use it as a computer.

    The scientists think there will be no paper in the office. And people can store what they want in the Paper Phone.

    The scientists from Queen's University in Kingston, Canada said the Paper Phone would be in style in the future. It may be the end of paper and printers.

    To make people be interested in this kind of mobile phones, the scientists will make it more beautiful. People will see the Paper Phone on May 10 this year.

    The Wandering Earth(流浪地球), China's first successful movie whose background is space, as shown on February 5. It is based on(基于)a short story of the same name by Liu Cixin, China's top  science—fiction writer.

    ⒈Capsule(太空舱)—a core(核心)element(要素)

    The space capsule used in the film has made the audience(观众)interested. "This was the first time anything like that was done, "said Wang Hong, the producer(制片人)of the movie. At first, the production(制作)team planned to use a small space capsule that had appeared in an earlier film, but found that it could not meet their needs for filming.

    ⒉Giant vehicles(巨大的车辆)—key to the film

    Giant vehicles are the key element in the film. Famous actors, Ng Man—tat and Wu Jing, said they could not even imagine what these vehicles would be like before filming, because the idea was far ahead of our time.

    The production team made about 10, 000 props(道具)to show the space better, including the giant vehicles.

    ⒊Saving planet itself

    In the film, the earth itself is pushed forward by 10, 000 giant

thrusters(推进器). It carries 3.5 billion people about 4.2 light years

through space in order to avoid destruction(破坏)by the dying sun.

In Liu's story, each thruster is 11, 000 meters in height.

    ⒋Amazing opening

    At the beginning of the film, it shows the environment and life in an

underground city—a big tree growing upside down, busy bookstores and snack bars and so on. There are also many snow scenes (片段)throughout the whole film.

    Do you think laughter can help you deal with pain? Scientists from Britain did two experiments(实验). The first was done in a lab. People wore special wristbands(腕带). Some of them were asked to watch comedies while others watched serious programs. Then the scientists tightened(勒紧)the wristbands to see how much pain the people could feel.

    The other test was done at an art festival. Some people watched a comedy show and others watched a drama(戏剧). At the same time, they had to put their backs against the wall and keep their legs bent(弯曲的)just like sitting on a chair. They did this before and after the show.

Scientists found that just 15 minutes of laughter improves people's ability to stand pain by 10%. However, the serious programs and the drama didn't make a difference to pain at all.

    The study found that the magic power of laughter comes from endorphins(内啡肽). These are chemicals(化学物质). They are produced by the human body. They make you feel less pain and can make people feel happier. Exercise can produce endorphins. Your muscles(肌肉)move in and out when you are laughing. Scientists believe that this makes your muscles tiring, so we start to produce endorphins.

    Scientists also found that the only real and relaxing laughter works not just polite laughter.

    Next time you have a headache, get together with a group of Mends, watch a funny movie and laugh. You will soon feel a lot better because laughter is the best medicine.

    Have you noticed the waste bins(垃圾桶) in different colors on the street? Do you often put all the waste in the same bin? It's reported by Changchun Daily that people must do waste sorting(分类)in most places in Changchun at the end of 2019. Waste sorting is a wonderful way to make good use of energy and protect the environment. But do you know how to sort the waste?

    Usually, people should sort their waste into four groups: wet, recyclable, harmful and dry. Different kinds of waste should go into different bins. Wet waste means the things you don't want but pigs can eat, mostly coming from your kitchen. Things that can be used again, such as paper, metal and glass, are recyclable waste. Harmful waste might be dangerous or cause serious pollution, like medicine and batteries(电池). And any waste that's not wet, recyclable or harmful will go into the dry waste bin.

    Different countries are trying different methods to sort the waste. A university in England has invented a smart bin. When people drop their waste into the bin. It can tell what kind of waste it it and sort it correctly. The bin can also compress the waste to make it smaller in size and take up less space. In South Korea, people have to separate their food waste from other kinds of waste and pay for it. The more food waste they throw away, the more they pay. Japan has the strictest rules for waste sorting in the world. For example, plastic bottles and their caps should go into different bins.

    When one door of happiness closes, another opens. However, we often look at the 1 door so long that we can't see the one that has been opened for us. It's true that we don't know 2 we've got until we lose it, and it's also true that we don't know what we've been 3 until it goes away.

    Giving someone all your 4 doesn't mean that they'll love you back. Don't expect love in return. Just 5 for it to grow in their hearts.

    There are many moments in life when you miss someone so much that you want to bring them into your 6 and hug them for real! Dream what you want to dream, go where you want to go, and 7 what you want to be, 8 you have only one life and one chance to do all the things you want to do.

    Happiness lies in those who have cried, those who have been hurt, those who have searched, and those who have tried, for only they can understand the 9 of their lives. The 10 future will always be based on a forgotten past. You can't go on well in your life until you let your past failure and heartaches go.