名词
中文翻译：饱和度不足的流体
同义词：
['under-saturated fluid', 'undersaturated liquid']
例句：
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1. The underground wateris often used as a source of fresh water.
地下水通常被用作淡水资源。
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2.The oil reservoir is undersaturated with water, making it difficult to extract.
油藏水饱和度低，难以提取。
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3.The chemical reaction is undersaturated, indicating that more reactants are needed.
化学反应未饱和，表明需要更多反应物。