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地球对地球上的一切物体都有一种眼睛看不到的吸引力,即重力。重力是人们生话中的重要因素之一,如果没有重力,则大气将飘浮而去,人类的生命也将完结。
Earth has an invisible attraction to all objects on the earth, namely gravity. Gravity is one of the important factors in people’s life. If there is no gravity, the atmosphere will float away and human life will end.