Pfs
abbr. porous friction surface(d) 渗透摩擦面
🗣️ 情景例句
Well, I'll try to arrange the schedule, Dr. Stewart.
好吧，尽力去安排，Stewart大夫。
I don't know the answer, but let me ask Mr. Chen to comment on that.
我不知道答案，让我问一下陈先生看他有什么看法。
Many people in industry and the Services, who have practical experience of noise,regard any investigation of this question as a waste of time;
在工业部门工作和在军队中服役的许多人对噪音有切身的体会，他们认为对这个问题进行调查是浪费时间，