Corotron
电晕管； 电晕发射装置
🗣️ 情景例句
6:00 sharp, please.
请6点整叫我。
To a boiling pot flies come not.
苍蝇不叮沸水壶。
Mary is still writing letters. She's been writing letters all day.
马力还在写信，她写了一整天的信。