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宇航局计划4年之后发射新型的宇宙飞行器,然后在2020年以前恢复载人登月飞行,最后的目标是登上火星。
NASA wants to resume manned flights to the Moon by 2020 with the eventual goal of reaching Mars.
youdao
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宇航局计划4年之后发射新型的宇宙飞行器,然后在2020年以前恢复载人登月飞行,最后的目标是登上火星。
NASA wants to resume manned flights to the Moon by 2020 with the eventual goal of reaching Mars.
youdao