Undulators
(undulator 的复数) [电] 波纹印码机
🗣️ 情景例句
That's beside the point.
那与话题无关。
There are three apples on the plate.
盘子上面有三个苹果。
Three months passed, and then one morning, Sam found his wallet outside his front door.
3个月过去了，后来在一天早晨，萨姆在自己的大门外发现了他的钱包。