Harmodotron
(产生毫米波的)电子束管, (正交场)毫米波振荡管
🗣️ 情景例句
Money is everything to him.
钱对他而言是最重要的东西。
If you dance you must pay the fiddler.
要想寻欢作乐，代价非付不可。
Can't you see? Look! It has an egg in it.
你没看见吗？瞧！里面有一只蛋。