Gatedamplifier
门信号放大器
🗣️ 情景例句
No, we didn't leave anything in the room.
不是， 我们没有弄丢任何东西在房间里 。
Would you please put it on top?
能请你把它放在最上面吗?
Somebody's knocking at the door. I'll answer it.
有人在敲门，我去开。