Undulations
(undulation 的复数) n. 波动, 波状弯曲, 起伏\\n[医] 波动
🗣️ 情景例句
I suggest that we go climb White Cloud Mountain tomorrow.
我建议明天一起去爬白云山。
Get off on the wrong foot.
出师不利。
Yet to both classes, the need of an alternative outlook,
然而对这两种人来说，都需要换一换脑子，