英语句子翻译
Everybody knows that the air has weight and that it press on everything on the surface of the earth,no less than fourteen and a half pounds to the square inch.But over a sheet of Cavorite this is not the case,becase it blocks the gravity from the earth below it.The next step would be to build a machine in which to apply that great discovery.
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问：working hard vs. hard working
答：there are no defferent.详情>>
