名词
中文翻译：下表面
同义词：
['subsurface', 'substratum']
例句：
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1.The undersurface of the rock is covered in moss.
岩石的下表面覆盖着苔藓。
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2. The research team studied the undersurface of the lake to understand its hydrology.
研究团队研究了湖泊的下表面以了解其水文状况。
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3.The undersurface of the ocean is home to a diverse array of marine life.
海洋的下表面是各种海洋生物的家园。