It looks like what's at issue is less how long your food stays on the floor and much more how contaminated with bacteria that patch of floor happens to be.

看起来问题的焦点不太在于你的食物在地上停留的时间长短，而更在于那块地被细菌污染到了什么程度。

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As parks and school grounds are stripped of contaminated topsoil, the city is doing the only thing it can do: burying the waste under the sites from which it was removed.

将公园和学校等地附近被污染的土壤挖走，似乎是唯一选项，而核废料被处理后埋土壤下，地点则是在被挖去土地的那些地方。

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No one knows exactly how clean a hand dryer is, and there is the possibility that it might be blowing hot, contaminated air onto your hands instead of hot, clean air.

没有人准确的知道如何清洁手干燥机，并有可能，它可能被污染的空气吹入的热，到你的手中，而不是热空气清洁。

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It is transmitted through contaminated food, drinking water and faeces.

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It is probable that it has an animal source, but whether it spreads from contaminated food or something else in the environment is unknown.

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Even when firms such as Unilever manage to find a source of, say, non-modified soya to put in their products, it tends to get contaminated with genetically modified stuff since there is so much of it about.

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