这是半个世纪来美国宇航局NASA日程上首次没有载人太空飞行任务。

For the first time in half a century, the space agency Nasa has no manned space flights on its agenda.

youdao

这是半个世纪来美国宇航局NASA日程上首次没有载人太空飞行任务。

For the first time in half a century, the space agency Nasa has no manned space flights on its agenda.

youdao