航天

航天
hángtiān
[spaceflight; aerospace; spacefaring] 在太阳系范围内作行星际的飞行称为航天, 而把在太阳系范围外的恒星际的飞行称为航宇

Advanced Chinese dictionary. 2013.

Игры ⚽ Поможем написать курсовую

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