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同学们都知道,太空中没有空气,航天员以及太空中的其他物体都处于失重状态,因此航天员在太空中的衣食住行等都与在地面上不一样,是非常奇妙的。
As the students know, there is no air in space, and the astronauts and other objects in space are all in a state of weightlessness. Therefore, the astronauts in space are different from the ones on the ground. This is wonderful.