undulated ipecac

例句：

1. 1.The river is undulated by thehills on either side.
   这条河被两边的山丘蜿蜒穿过。
2. 2. Theroad winds undulatedthrough the forest.
   这条路蜿蜒穿过森林。
3. 3. The waves were undulatedby the wind.
   波浪被风吹得起伏不定。