Klystrons
(klystron 的复数) n. 调速管\\n[化] 速调管
🗣️ 情景例句
Would you mind opening your suitcase?
请把您的箱子打开，好吗？
Who undertakes many things at once, seldom does anything well.
许多事情同时干，一件事也办不成。
The third, or main wave,
第三种波，即主波，