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
The scam they were running left many people penniless.
他们的这场骗局让人们分文不剩。
Eat one's cake and have it.
又要马儿好，又要马儿不吃草。
Letter
2第二封信