Harmodotron
(产生毫米波的)电子束管, (正交场)毫米波振荡管
🗣️ 情景例句
If you don't go to college, you'll never get a good job.
你要是不上大学，就永远找不到好工作。
The cameraman is filming a famous star.
摄影师正在拍摄著名影星的电影。
Please proceed with your presentation.
请开始你的简报。