Klystron
n. 调速管\\n[化] 速调管
🗣️ 情景例句
What's on my schedule for today?
我今天有什么日程安排？
Two blacks do not make a white.
两个乌黑不等于一个清白。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。