Astrodynamics
n. 天文动力学, 宇宙飞行力学
🗣️ 情景例句
African athletes are good at track and field events.
非洲选手擅长田径项目。
I try to keep in touch with current events by reading the newspapers.
我经常读报以尽量了解时事。
It was his job to repair bicycles and at that time he used to work fourteen hours a day.
他那时的工作是修理自行车，并且通常是一天工作14个小时。