名词
中文翻译：起伏
同义词：
['undulation', 'wave', 'oscillation例句：1. The waves gently lapped against the shore.（波浪轻轻地拍打着海岸。）']
例句：
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1. The waves gently lapped against the shore.
波浪轻轻地拍打着海岸。
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2.The undulations in the sea surface were caused by wind and currents.
海面上的波纹是由风和水流造成的。
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3.The sound of the waves was a constant reminder of the ocean's power.
海浪的声音不断地提醒人们海洋的力量。