名词
中文翻译：起伏的
同义词：
['undulating current', 'undulating wave', 'undulating surface例句：1. The waves are undulating gently in the ocean.（海浪在海洋中轻轻起伏。）']
例句：
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1. The waves are undulating gently in the ocean.
海浪在海洋中轻轻起伏。
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2. The undulating waves were so beautiful that they seemed to dance.
起伏的波浪如此美丽，仿佛在跳舞。
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3.The undulating surface of the lake was reflecting the sunlight.
湖面起伏的表面反射着阳光。