Pfcs
abbr. 全氟化碳；全氟代烃类
🗣️ 情景例句
I can't believe I'm hearing this!
我不能相信我在听这些！
I know the boy whose father is a guide.
我知道那个男孩的父亲是导游。
I've read about it,but I'd like to know more about it.
我已经知道了一点儿，但我还想多了解一些。