Polyhalogenation
多卤化反应
🗣️ 情景例句
... Oh, oh, I see.... Oh ... certainly.
……嗯 嗯 我知道了。……嗯……一定。
Misfortunes never (seldom) come alone (single).
祸不单行。
It's time to get down to business now.
是进入正题的时候啦。