Donutron
笼圈式谐振腔磁控管
🗣️ 情景例句
The cassette player and the tapes.
卡式录音机和录音带。
Easy come, easy go.
来的容易，去的快。
We're going to meet here, outside the school gate, at two o'clock.
我们打算两点钟在校门外见面。