Klystrons
(klystron 的复数) n. 调速管\\n[化] 速调管
🗣️ 情景例句
What number are you trying to dial?
你要的电话是什么号码？
Time and tide wait for no man.
岁月无情。
He began his diet a week ago.
他是一星期前开始节食的。