Pfs
abbr. porous friction surface(d) 渗透摩擦面
🗣️ 情景例句
Well, do you have the phone number there?
那么， 有那儿的电话号码吗？
Once bit, twice shy.
一朝被蛇咬，三年怕草绳。
His talk covered many subjects.
他的报告涉及很多课题。