Pfs
abbr. porous friction surface(d) 渗透摩擦面
🗣️ 情景例句
I can't figure out why he quit his job.
我不能理解他为什么要辞职。
Readiness is all.
有备无患。
No wonder you can't sleep when you eat so much.
你吃这么多难怪睡不着。