Polyhalogenation
多卤化反应
🗣️ 情景例句
Please forgive me, Susan, but...
请原谅我 ，Susan， 但……
I buy some food on my way home.
我回家路上买些吃的。
That's a nice car. How long have you had it?
好漂亮的汽车。你买多久了？