saspacewalkAnytimean的精選

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【2019•山東東營】What’saspacewalk?Anytimeanastronautgetsoutof...

【2019•山東東營】What’saspacewalk?Anytimeanastronautgetsoutof...

2019-07-17
問題詳情：【2019•山東東營】What’saspacewalk?Anytimeanastronautgetsoutofaspacecraft(航天器)whileinspace,itiscalledaspacewalk.Astronautsgoonspacewalksformanyreasons.Forexample,experimentscanbeplacedonth...