Quadratron
热阴极四极管
🗣️ 情景例句
Hello, nice to meet you. By the way, nice shoes you have.
你好，很高兴见到你。 顺便提一下， 你的鞋子很漂亮。
We go to bed at 10:30.
我们十点半睡觉。
That's the end of the tour.
参观就此结束了。