Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
He always performs his tasks perfectly.
他总是圆满地完成工作。
Just a minute, please.
请等一下。
adopted by banks, of printing the customer's name on his cheques.
某些银行已采用把储户姓名印在支票上的作法。