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
but I'm taking a little time to smell the flowers.
我正利用一点时间轻松一下。
All of my paycheck disappears so quickly.
我的薪水在不旋踵之间都消失无踪了。
Sam was sure that the wallet must have been found by one of the villagers, but it was not returned to him.