Spiratron
旋束管(离心静电聚焦行波管), 径向聚束行波管, 螺旋管
🗣️ 情景例句
Mmm-hmm. That's because he's sleeping.
嗯。那是因为他睡了。
The napkin is dirty, Would you bring me a clean one, please?
这餐厅是脏的，请你拿个干净的给我。
That'll be very intersting. What cities are you going to visit?
那一定很有趣。你们打算参观哪些城市？