Pnpndiode
[电] PNPN(四层)二极管
🗣️ 情景例句
I'm glad if you are, Harry.
假如你很确定， 我就高兴， Harry。
Where do you have your lunch?
你在哪儿吃午饭？
Which language is spoken by the largest number of people in the world?
世界上哪种语言说的人最多？