Thermionic valve
热离子管，热阴极电子管
📖 牛津释义
thermionic valve
(US ,thermionic `tube), vacuumtube in which a flow of electrons is emitted by heated electrodes, used in the receiving of radio signals, etc 热离子管.
🧩 词语组成解析
a. 热离子的\\n[电] 热离
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
May I make an appointment now?
现在可以预约门诊吗？
You must get used to getting up early.
你必须习惯于早起。
My grammar is improving, but I find idioms and useful expressions hard to learn.
我的语法在进步，但我发现习语和有用表达很难学。