名词
中文翻译：起伏的地形同义词
同义词：
['undulate', 'undulates', 'undulates']
例句：
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1. Thelandscape is dotted with rolling hillsand undulating valleys.
风景中点缀着起伏的山丘和蜿蜒的山谷。
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2. The river flows through a regionof undulating hills.
河流流经一片起伏的丘陵地带。
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3. Theundulating terrain made itdifficult for the hikers tofind their way.
起伏的地形使徒步旅行者难以找到前进的方向。