Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
It's almost ten o'clock.
差不多十点了。
There's as good fish in the sea as ever came out of it.
海里的好鱼是取之不尽的。
July 13th, in London.
7月13号，在伦敦。