R-f plumbing
[电] 射频垂铅
🧩 词语组成解析
plumbing
['plʌmiŋ]
n. 水管装置;水暖工的工作;管道工程;
v. 用铅锤测量（plumb的现在分词）;探究;
🗣️ 情景例句
Yes, I use it fairly often.
有，我常用。
Youth means limitless possibilities.
年轻意味着无限希望。
I don't know. I think he's very old.
不知道。我想他年纪一定很大了。