Pfa
abbr. 故障預警分析（Predictive Failure Analysis）；職業球員聯盟（Professional Footballers' Association）；全氟烷氧基烷烴
??? 情景例句
I do.
我愿意。
I'm thinking of going to my grandma's.
我想去外婆家。
He suggested that a double railway-tunnel should be built.
他提議建一條雙軌隧道，這樣就解決了通風問題。