Libration point
拉格朗日点; 秤动点
🧩 词语组成解析
n. 摆动, 天平动
🗣️ 情景例句
You must observe these simple rules.
你必须遵守这些简单的规定。
I ought to take her home.
我应该送她回家。
and then there are three thousand million other Milky Ways, or galaxies, in the universe.
况且在宇宙中还有30亿个天河，即银河系。