- 问题详情:BEINGanastronautsoundscool,doesn'tit?Inspace,theygettodosomeprettyamazingthings,likefloatinginzerogravity(重力).However,therearealsoplentyofthingsthatastronautscan'tdobecauseoftheirweightlessenvironment,andthat'sverysad.What'sworse,theyca...
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