Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
the autograph of somebody who may be famous someday.
将来有可能成名的人的亲笔签名。
Is there any chance of my borrowing your typewriter?
能不能借用一下你的打字机？
I like reading English books, but they're sometimes rather hard.
我喜欢看英语书，但有时候英语书相当难读。