Cathetron
[电]外控式三极汞气整流管
🗣️ 情景例句
How about cleaning up a bit around here?
你是不是该把这儿收拾一下？
Many a little (or pickle) makes a mickle.
积少成多。
I could see a snake, a bear, a wolf, but no people.
我还看见一条蛇、一只熊、一只狼，但没有看见人。