Undulators
(undulator 的复数) [电] 波纹印码机
🗣️ 情景例句
since her mother died.
因为她妈妈去世了。
I forgot what I was gonna say.
我忘了要说什么了。
They may also have used wood and skins, but these have rotted away.
他们也可能用过木头和兽皮，但这类东西早已腐烂殆尽。