Cathetron
[电]外控式三极汞气整流管
🗣️ 情景例句
I wasn't good at it, and I didn't like studying it.
我不精于此道， 也不爱去学它。
I'm the worst pupil in my party.
我是我的聚会中最坏的学生。
I am even less lucky.
我的运气甚至还不及他们。