The diagnosis is dependent on the collection and analysis of an uncontaminated urine specimen.
这个诊断是依据收集和分析无受污染的尿液标本.
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It's hard for an ordinary person to remain uncontaminated after years in official circles.
一个平常人在官场里呆久了,想要涅而不缁,是很难的.
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With today's technology, you expect your audio experience to be clean and uncontaminated.
随着今天的技术, 您希望您的音频体验,将清洁和无污染.
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