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
Keep quiet, I'm trying to get some work done.
请安静，我要处理一些工作。
This woman is washing dishes again.
这个女人又在洗盘子了。
In the evening, the children come home from school.They arrive home early.
傍晚，孩子们放学回家。他们到家很早。