Bilateral constraint
[化] 双侧约束
🧩 词语组成解析
🗣️ 情景例句
Where are your manners?
你的规矩哪里去了？
Between two stools one falls to the ground.
脚踏两头要落空。
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。