Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
I just want to confirm that the arrangements have been made.
我要确认所有计划都安排好了。
It can't be true.
这不可能是真的。
You must weigh it carefully.
你必须仔细地称一称重量。