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
and where do they report?
他们去哪儿报到？
Judy is so reserved that it is hard to understand her.
朱迪非常内向而木讷，因而很难使人了解她。
Really?
真的吗？