Undulators
(undulator 的复数) [电] 波纹印码机
🗣️ 情景例句
Mary is not available at the moment.
Mary现在没空接电话
It is good to be merry at meal.
席间心情愉快是为上策。
Fine, thank you. And you?
我很好，谢谢。你怎么样？