R-f preselectors
[电] 射频预选器
🗣️ 情景例句
Sorry to be a pest.
不好意思打扰你。
If you don't take my advice,you'll be sorry.
如果你不接受我的忠告，你将会遗憾的。
The more you exercise, the fitter you will be.
越运动，越健美。