VERB 波動;起伏;搖曳 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. 波動;起伏;搖曳 [literary] [Also VERB n]
As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks. [VERB]
我們一路南行,鄉間開始變得起伏不平,綿延的山巒一直延伸到河岸。
His body slowly undulated in time to the music. [VERB]