Klystrons
(klystron 的复数) n. 调速管\\n[化] 速调管
🗣️ 情景例句
but, well, we've still got some time for a cup of coffee.
不过， 我们还有喝杯咖啡的时间。
Draw water with a sieve.
竹篮子打水一场空。
Let's think carefully, I replied.
“让我们仔细想一想，”我答道。