R-f preselectors
[电] 射频预选器
🗣️ 情景例句
I don't know. It's locked.
不知道， 锁着呢。
Necessity is the mother of invention.
穷则变，变则通。
In England they call this line a queue. You must always wait in a queue.
在英国人们把这样的行列叫队。等车时你总得排队。