Pfa
abbr. 故障预警分析（Predictive Failure Analysis）；职业球员联盟（Professional Footballers' Association）；全氟烷氧基烷烃
🗣️ 情景例句
I'm extremely sorry for the delay.
对此延误，我深感抱歉。
What are you drawing?
你正在画什么？
We'll have to talk this over some more.
这件事我们得好好地再谈一谈。