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
I have to cram all night for tomorrow's exams.
为了明天的考试，我得熬夜临阵磨枪。
Sorry to bother you, but do you have change for a one?
对不起，麻烦你，你有1元钱的零钱吗？
She's very well, too, Helen.
她也很好，海伦。