Pnpndiode
[电] PNPN(四层)二极管
🗣️ 情景例句
She can't sit around and do nothing.
她总不能闲坐着无所事事呀。
Lily is a Sophomore now.
莉莉现在大学二年级。
We were very much surprised when the snake charmer suddenly began to play jazz and modern pop songs.
当耍蛇人突然又吹奏起爵士乐和现代流行乐曲时，我们感到非常惊奇。