Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
She has the ability to keep calm in an emergency.
她有处变不惊的本事。
He doesn't think that beer tastes good.
他不认为啤酒的味道好。
She spent a lot of money on books.
她花了很多钱来买书。