Polychlorocarbon
[化] 多氯烃; 多氯代烃
🗣️ 情景例句
We'll come upstairs and get you in a little while.
我们待会儿就上楼来带你下去。
I wish it would stay this way for the weekend.
但愿整个周末都能保持这样的好天气。
How often do you write?
你们隔多久写信？