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
Well, let me see.
哦,让我想想。
She served a flavorous stew to her friends.
她招待朋友香喷喷的炖肉。
Their humbler followers, such as partridges, have a like power of strong propulsion, but soon tire.