R-f preselectors
[电] 射频预选器
🗣️ 情景例句
A rolling stone gathers no moss.
滚石不能苔。
What's so funny?
什么事那么好笑？
It looks like a chicken. But I don't think chickens can swim.
看起来像只小鸡。不过我认为小鸡不会游泳啊！