Klystrons
(klystron 的复数) n. 调速管\\n[化] 速调管
🗣️ 情景例句
We have several package tours you may choose, from ten days to three weeks in Europe.
我们有几套欧洲旅游计划选择，时间从10天到3个星期。
He that has a tongue in his head may find his way anywhere.
遇事多问，随处可行。
Do you want any sugar?
你要放些糖吗？