Undulations
(undulation 的复数) n. 波动, 波状弯曲, 起伏\\n[医] 波动
🗣️ 情景例句
Some feel that the media has too much power these days.
有人认为现在媒体的影响力太大了。
It wasn't any bother.I was glad to do it.
不麻烦.我乐意做。
Hi! Where are you from?Hi
，你是哪里的？