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This is the fifth space walk they had to do on this mission.
这已经是他们为完成此项任务所做的第五次太空行走。
youdao
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The final space walk to fix the Hubble space telescope is underway.
修理哈勃太空望远镜的太空行走计划正在实施当中。
youdao
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The final space walk to fix the Hubble space telescope is underway.
修理哈勃太空望远镜的太空行走计划正在实施当中。
youdao