以感动为题的80词初二英语作文有翻译
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the difference is very young. However, if a child travels in a long distance in a space ship that travels to the speed of light, the difference is much greater. When he comes back, he will be much younger than the other person on earth.. This is called the twin paradox. However, only one has the idea of absolute time to the mind of the people, this is a p
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