... weightless economy 无重经济 ; 无重量经济 weightless condition 无重情况 Weightless Mist 失重之雾 ...
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They are in a condition of weightlessness. And this is why, in rockets and space capsules, weightless astronauts and objects float about in the air.
这就是为什么在火箭和宇宙飞船里，失重的宇航员和物体会在空中漂浮。
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