Spationautics
宇宙航行学
🗣️ 情景例句
Did you know
你知道
I'm looking for a part-time job to help put me through school.
为了使我能够从学校毕业，我正在找兼职工作。
At the age of twelve years, the human body is at its most vigorous.
人体在12岁时是生命力最旺盛的时期。