Valve amplifier
[计] 电子管放大器
🧩 词语组成解析
valve
[vælv]
n. 阀;真空管;（管乐器的）活栓;（心脏的）瓣膜;
vt. 装阀于;以活门调节;
🗣️ 情景例句
The book is above me.
这本书我读不懂。
We would like to ask you to come here for an interview.
我们想约你来参加面试。
What about the dog?
那么狗呢？