Monohalogenation
一卤化作用
🗣️ 情景例句
Let's dance.
咱们跳舞。
She looks blue.
她满面忧伤。
For a whole week I did not smoke at all and during this time, my wife suffered terribly.
整整一个星期我根本没有吸烟。在此期间，我妻子吃尽了苦头。