undulation
n
(a) [U] wave-like movement or appearance 波动; 起伏.
(b) [C] one of a number of wave-like curves or slopes 波状的弯曲或斜坡
The downs fell in gentle undulations to the sea. 这块丘陵地略带倾斜伸向大海.
🗣️ 情景例句
I'll try to squeeze you at 2:30 p.m.
你来如何?我会在下午2点半挤出时间的。
Might is right.
强权即公理。
Many people in industry and the Services, who have practical experience of noise,regard any investigation of this question as a waste of time;