Monochlorination
一氯化作用
🗣️ 情景例句
Prices are always negotiable.
价钱总是可以商量的。
As soon as I get to Guangzhou, I'll drop you a line.
我一到达广州，就给你写信。
Unfortunately you'll have to pay the fine before you check those books out.
在你借书之前你要先付清罚款。