Klystron
n. 调速管\\n[化] 速调管
🗣️ 情景例句
I have to think about it.
我得想一想。
Opportunity, sooner or later, comes to all who work and wish.
只要努力工作而有志向，机会迟早终会来临。
How would you go to Beijing, by air or by train?
你怎样去北京，是乘飞机还是坐火车？