Polyfluocarbon
[化] 多氟烃
🗣️ 情景例句
Good-bye, Robbie. Good luck.
再见 ，Robbie ，祝你好运。
Do you have any rooms?
你有房间吗？
I have heard of writers who read nothing but their own books;
我听说一些作家，除了自己的书外，别的书一概不读，