Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
Good night, Robbie.
晚安，Robbie。
If you want knowledge,you must toil for it.
若要求知识，须从勤苦得。
He's younger and stronger than you are.
他比你年轻，比你强壮。