Cathetron
[电]外控式三极汞气整流管
🗣️ 情景例句
That's a good idea.
好主意。
If you concentrate all your energies on the study of English, you will master the language.
你若全力以赴地学习英语，你会掌握这门语言的。
What a strong wind! It's blowing strongly.
好大的风啊！风刮的好大。