Pfcs
abbr. 全氟化碳；全氟代烃类
🗣️ 情景例句
They're in my office.
在我办公室。
Whom do you want to call?
你要打电话给谁？
Just a minute. I'll see if I'm free. No, I'm not. I've already got something on that evening.
等一会。我看看是否有空。不，我没空。我那天晚上已经有了安排。