名词
中文翻译：未精炼的
同义词：
['unrefined', 'unprocessed']
例句：
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1. The water was underpurified, making it difficult to drink.
水未经过净化，难以饮用。
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2. The company's products are underpurified compared to its competitors.
该公司的产品相比竞争对手来说未经过充分净化。
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3. The raw materials used in the production process need to be underpurified to ensure quality.
生产过程中使用的原材料需要经过充分净化以确保质量。