NoV was detected from 31.4% of environmental swabs post cleaning.

在清洁后，31.4%的环境采样中发现诺如病毒。

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The passivation process defined in 3.1.1.2 will occur without further chemical treatment, but may be augmented and improved by the post-cleaning treatments defined in 3.1.1.3.

钝化过程（在3.1.1.2说明）在没有进一步的化学处理情况下也会发生，但钝化作用将会被“后清洗处理”（在3.1.1.3说明）提高增强。

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The passivation process defined in 3.1.1.2 will occur without further chemical treatment, but may be augmented and improved by the post-cleaning treatments defined in 3.1.1.3.

钝化过程（在3.1.1.2说明）在没有进一步的化学处理情况下也会发生，但钝化作用将会被“后清洗处理”（在3.1.1.3说明）提高增强。

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