undulating ground起伏地;丘陵地;波状土地
undulating anticline波状背斜
undulating line丘陵起伏线;起伏较多之路线
undulating brick起伏砖
undulating tube管壳
Undulating Strip起伏狭长
undulating propagation起伏传播
undulating current波动电流
V-I（不及物动词） Something that undulates has gentle curves or slopes, or moves gently and slowly up and down or from side to side in an attractive manner. 连绵起伏 [文学性]
As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks.
随着我们游向南边，乡间的山丘变得连绵起伏与河岸相接。
ADJ（形容词） undulating
...gently undulating hills.
...平缓起伏的小山。