Invention changed the world and changed our lives. The price of bicycle is cheap, the whole is not heavy, convenient for us to travel, can exercise our body, is good for health, will not pollute the environment, is very beneficial to us and the world. Television opens our eyes to the world. It is mainly used to relax themselves and bring happiness to themselves. It has a lot of healthy and useful information. It can be beneficial to our study, but it is bad for our eyesight. I think the invention is a machine. It can help students with their homework. Because students have more and more homework, I hope this machine can help them.
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