Donutron
笼圈式谐振腔磁控管
🗣️ 情景例句
And time passes so quickly.
可是时间过得很快。
We are looking forward to your reply to our inquiry.
我们期待你方对我方的询盘做出答复。
The officer in the control tower was very angry when he heard the news,
控制塔上的官员得知这一消息后，非常气愤，