名词
中文翻译：不纯
同义词：
['impurity', 'impurity例句：1. The water was so pure that it tasted like rain.（水如此纯净，尝起来像雨。）']
例句：
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1. The water was so pure that it tasted like rain.
水如此纯净，尝起来像雨。
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2.The food was contaminated with impurities from the factory.
食物被工厂的杂质污染了。
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3.The purity of the water is a concern for environmentalists.
水的纯净度是环保主义者关心的问题。