她走路时臀部有着优美的波浪式摆动。

She walked with an ___undulant sway of her hips.

她的长发随着音乐如波浪般起伏摆动。

Her hair moved in ___undulant waves to the music.

远处的山峦呈现出柔和的波浪形轮廓。

The distant mountains have ___undulant outlines that look soft and wavy.