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2013-05-23 12:21
求翻译：throughout the short history of the exploration of space , several space stations have been put into orbit . the first manned space station was the soviet station salyut 1 , put into orbit in 1971 . later , in 1986 , the soviet union launched the mir space station . mir stayed in orbit until march 23 , 2001 , over that是什么意思？ 待解决
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throughout the short history of the exploration of space , several space stations have been put into orbit . the first manned space station was the soviet station salyut 1 , put into orbit in 1971 . later , in 1986 , the soviet union launched the mir space station . mir stayed in orbit until march 23 , 2001 , over that
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