Halogenation
n. [化]卤化
🗣️ 情景例句
The smog in L.A. is caused by air pollution and water vapor.
洛杉矶的烟雾是由空气污染和水蒸气造成的。
In college I majored in history, What was you major?
大学时我主修历史，你主修什么呢？
The relay race
接力赛