Phanotron
[电] 热阴极含气整流管
🗣️ 情景例句
What are the best exercises for my health?
什么是最利于我身体健康的锻炼方式？
Do you know when he will be back?
你知道他什么时候会回来？
It is called a clavichord.
被称作古钢琴，