Pfs
abbr. porous friction surface(d) 渗透摩擦面
🗣️ 情景例句
Can I invite Alexandra to stay for dinner?
我可以请Alexandra留下来吃晚餐吗？
Could you hold your questions until I've finished?
请你把你的问题留到我把事情做完再问好吗？
Who but Jack would do such a thing?
除了杰克谁会做这种事呢？