Perfluocarbon
[化] 全氟化碳
🗣️ 情景例句
I'm leaving for Beijing on a four-day tour.
我马上要去北京旅游4天。
He has a sweeter.
他有一件毛衣。
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，