A terrible explosive noise was heard, immediately followed by strong shaking of the classroom building. Mrs. Li Lan, a country school teacher in Sichuan, who was giving a class, could hardly keep on her feet, and many of her pupils made panic cries. Mrs. Li realized at once that it must be a powerful earthquake hitting the area. Though she herself was scared, she managed (设法) to make the children calm down, opened the door right away and told the children to leave the classroom and get down to the playground as quickly as possible.

When all the children had left, she followed them to the first floor. The earth still kept moving violently (巨烈地). Some of the buildings nearby were falling down, and a great number of falling stones were rolling down from the hills behind the school. Suddenly, she found a little boy fell over and was hit by a big stone right on his body. She forgot the danger she was facing and ran over, trying to push the stone away. The stone was so big that it was not easy for her to move it. She kept pushing until the boy was pulled out, carrying him to the center of the playground. The boy was later sent to hospital and saved.

    The famous scientist and thinker, Charles Darwin, was born on February 12, 1809. His family lived not far from the River Severn, England. As a boy, Charles liked to go for walks in the fields and forests. He enjoyed watching nature, and comparing what he saw with everything he had read in science books. He also liked collecting very much. He collected many things, birds, eggs, stones and leaves.

    At sixteen Darwin was sent to Edinburgh University to become a doctor. But he was interested in the history of nature.

    Then he was sent to study in Cambridge University. There he studied until 1831.

    Some time later he heard that the ship Beagle was going on a trip to South America and wanted a scientist. His teacher advised him to go. So when the Beagle left England in December, 1831, Darwin was on it. The trip lasted almost five years. Darwin saw many new plants and animals. He collected all kinds of plants.

    In 1842 Darwin went to live in Kent, and there he continued his studies of change in nature. Darwin understood that plants and animals are not always the same, and that they really change. By 1859 Darwin had finished his famous book The Origin of Species.

    In 1871 Darwin wrote another important book, the Theory of Evolution.

    Darwin continued his studies in science until he died in 1882.

    Thomas Alva Edison is one of the greatest inventors of all times. One of his most famous achievements is the electric light. He tried thousands of times to make a long lasting light bulb (灯泡). Although the light bulb is not his invention, he is the only one to have made such a successful light bulb. Many people remember him for the invention of the electric light. He held a lot of patents (专利权) worldwide. Many of them were approved (批准) in USA.

    We can find his inventions in many fields. In fact, many of the advanced inventions were based on his ideas. He invented a phonograph (留声机), a film picture camera, a ticket recorder and so on.

    Edison was not a good student at school. But he loved to do new experiments. When he was still a child, he built his first lab to perform his experiments.

    An amazing story of Edison's childhood is that he almost made his servant die. Edison used to think that birds ate insects and these insects might make them fly. So, he collected these insects and blended them to make juice. He then let his servant drink the juice. After drinking the juice, the girl lost her sense. But luckily, she was saved.

 Type in"A cat wants to go to space" and ask ChatGPT to write a bedtime story. Just one second later, you' ll get the story of the cat Max, who makes his way to the space after many difficulties and is finally able to sing among the stars. ChatGPT is a new artificial intelligence(AI) tool. It answers questions. And it can write long articles and stories. 

ChatGPT is developed by a US company OpenAI, and it has taken the Internet by storm,  winning 100 million users since it came out in November 

2022. People can ask the robot to write stories and emails, create menus, translate languages, and answer all kinds of questions. 

 Compared with Siri or other chatbots(聊天机器人), ChatGPT uses a much bigger database(数据库) for training. It also uses stronger software and hardware to learn things by itself. For example, if it provides a wrong answer to your question, you can tell it the right one and it will make corrections. " It's a totally different product. " the computer scientist Liu Xiaoguang from Nankai University told Tianjin Daily. " The knowledge level ChatGPT shows is almost the same asa university student. That's why it shocked the world. "

 But one big problem with ChatGPT is that it makes mistakes or even gives fake information. When Rezza, a 28- year- old man from Indonesia, used the robot to write a passage, " It gave out unreal academic(学术的) speech. " he said. Since the robot is trained using words from the Internet, it may also have an unfair opinion about certain groups. These are all things that need to be solved. 

 Although the latest AI product helps a lot, we should still think twice before using ChatGPT for help. Whether that's a good or bad thing needs to be seen.