名词
中文翻译：起伏的
同义词：
['undulation', 'wave', 'undulations例句：1. The waves were undulating gently in the sea.（海浪轻轻起伏在海中。）']
例句：
-
1. The waves were undulating gently in the sea.
海浪轻轻起伏在海中。
-
2.The undulations of the land are a testament to its rich history.
陆地的起伏是其丰富历史的证据。
-
3. The undulations of the ocean floor are fascinating to observe.
海洋底部的起伏现象令人着迷。