Spiratron
旋束管(离心静电聚焦行波管), 径向聚束行波管, 螺旋管
🗣️ 情景例句
Thank you very much for a wonderful party.
非常感谢你组织了这么精彩的聚会。
How old are you?
你多大了？
We both tried to get the coins, but it was too late.
我们俩都试图把这两枚硬币拿出来，但太迟了。