我们天天都要和称打交道，买东西要用称称。称分别有手称、台称、大到电子称，小到天秤。电子称能称上百吨的东西，但在古时没有很大的称时，要称很重的东西毫无办法了，可是三国时，曹操的儿子曹冲，小小年纪，能想出办法称出大象的重量，难能可贵，他的聪明才智，一直在人民心中流传千古。可是有谁见过能称地球的“怪人”吗？确有其人，请看《小学生之友》称地球的“怪人”。
We have to deal with scales every day. We need to use scales when shopping. The scales are hand scale, platform scale, electronic scale and Libra scale. The electronic scale can weigh hundreds of tons of things, but there is no way to weigh heavy things when there is no big scale in ancient times. But in the Three Kingdoms, Cao Chong, Cao Cao's son, was young and could figure out a way to weigh the elephant. His intelligence and wisdom have been flowing through the hearts of the people for thousands of years. But has anyone ever seen a "freak" who can call the earth? It's a real person. Please see what friends of primary school call the "strange person" of the earth.
要说称地球的怪人是英国着名的物理学家卡文迪许，他利用一根木棍和两个像哑铃的铅球，再用石英丝把两个铅球横吊起来，在地球的引力作用下，铅球发生摆动，石英丝扭动就能计算出地球的质量，在实验中由于铅球的引力太微弱，实验失败而告终。但卡文迪许在困难面前并没放弃，他像牛顿、爱迪生一样选择了坚强，他没灰心丧气，只知道研究苦苦思索，观察事物。他在走路时，偶然发现一个小孩在路边玩镜子，那太阳光影反射启发了他，他迫不及待在实验室里夜以继日开始长达50多年的实验，功夫不负有心人，终于在1798年按照万有引力的公式计算出地球的重量为60万亿亿吨。为称地球他由一个英俊的青年小伙子变成了一个白发苍苍的老年人。他为了真理，为了创造，为了科学研究，花了人生青春年华也在所不计。
To call the eccentric man of the earth is British famous physicist Cavendish. He uses a wooden stick and two dumbbell like shot balls, and then uses quartz wire to hang the two shot balls horizontally. Under the gravity of the earth, the shot ball swings, and the quartz wire twists to calculate the mass of the earth. In the experiment, because the gravity of the shot is too weak, the experiment fails. But Cavendish didn't give up in the face of difficulties. He chose to be strong like Newton and Edison. He didn't lose heart. He only knew to study and think hard and observe things. When he was walking, he happened to find a child playing with a mirror on the side of the road. The reflection of the sun's light and shadow inspired him. He couldn't wait to start the experiment for more than 50 years in the laboratory day and night. He couldn't bear the efforts of interested people. Finally, in 1798, according to the formula of gravity, he calculated the weight of the earth as 6 trillion tons. Called the earth, he changed from a handsome young man to a grey haired old man. For truth, for creation, for scientific research, he spent his youth in vain.
我读了这个故事以后，心里感慨万千，久久不能平静。想当一名科学家还真不容易，要研究发明创造一样东西就更不容易。将来我想当一名科学家，那么就要奋发图强，要努力读书，为实现这一个梦想而努力学习。学习中会遇到许多困难，学习就像一座珠穆朗玛峰，没有平坦宽阔的道路可行，只有悬崖峭壁等待你去攀登。只要你不怕苦不怕累，坚持向上，就能顺利到达顶峰，叶剑英元帅写下“攻城不怕坚，攻书莫畏难，科学有险阻，苦战能过关”的壮丽诗篇，鼓励我们去战胜困难。牢记呀！想要成为一名科学家，必须付出汗水和努力，梦想才能成真。
After I read this story, I was filled with emotion and could not be calm for a long time. It's not easy to be a scientist. It's not easy to research and invent something. In the future, if I want to be a scientist, I must work hard, study hard, and study hard to realize this dream. There will be many difficulties in learning. Learning is like a Everest. There is no flat and broad road, only the cliff waiting for you to climb. As long as you are not afraid of hardship and tiredness, you can reach the summit smoothly if you insist on going up. Marshal Ye Jianying wrote a magnificent poem that "if you attack a city, you will not be afraid of difficulties, if you attack a book, you will not be afraid of difficulties, if there are dangers in science, if you fight hard, you will pass the test", encouraging us to overcome difficulties. Remember! If you want to be a scientist, you have to work hard to make your dream come true.
