Polyfluorocarbon
[化] 多氟烃; 多氟代烃
🗣️ 情景例句
It's too soon to know for certain.
现在还太早， 不知道确切情况 。
How much paint did you want to order?
你要订购多少油漆？
Excuse the mess, Sam.This room's very untidy.
屋子很乱，请原谅，萨姆。