Corotron
电晕管； 电晕发射装置
🗣️ 情景例句
I'd like to check this book out.
我想借这本书。
What kind of grades did you make in college?
你在学院得到什么样的等级？
It is nine o'clock.Mr.Sawyer usually reads his newspaper at night.But he's not reading his newspaper tonight.
现在是9点钟。索耶先生通常是在晚上看报，但今天晚上他没看报。