Cathetron
[电]外控式三极汞气整流管
🗣️ 情景例句
Hello, my name is Li Ming and we have a reservation for party tonight.
喂，您好。我叫李明，我们在你们这预定了今晚聚会。
He has gone far beyond me in learning.
他在学问上超过我。
The refrigerator is white.
冰箱的颜色是白的。