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impurity

noun
🔊/ɪmˈpjʊərəti/
🔊/ɪmˈpjʊrəti/
(plural impurities)
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  1. [countable] a substance that is present in small amounts in another substance, making it dirty or of poor quality杂质
    • A filter will remove most impurities found in water.过滤器会滤掉水中的大部分杂质。🔊🔊
    • The substance is free of impurities.该物质不含杂质​​。
    • The water contains impurities which make it unsuitable for drinking.水中含有不适合饮用的杂质。
  2. [uncountable] the state of being dirty or not pure肮脏；不纯；淫秽 opposite purity
    3. Word Originlate Middle English: from French impurite or Latin impuritas, from impurus, from in- ‘not’ + purus ‘pure’.