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
Let's finish eating,
我们赶紧吃完。
Mr. Wagner, do you have a hotel reservation?
华格纳先生，你预订过旅馆吗？
Hello, Jim! Did you have a good time at the cinema?
你好，吉姆！你在电影院过得很开心吧？