Quadratron
热阴极四极管
🗣️ 情景例句
I wonder how he is making out in his new job.
不知他新工作做得怎么样。
Every door may be shut but death's door.
除了死门外，每门都可关。
I'd like to invite you to dinner before you go. What about Thursday?
我想在你走之前请你吃饭。周四怎么样？