The composition of the food and the surface on which it falls matter as much if not more than the length of time it remains on the floor, the study found.
这项研究发现，在细菌污染方面，食品与地面质材的组合与食品接触地面的时长几乎同等重要。
The composition of the food and the surface on which it falls matter as much if not more than the length of time it remains on the floor, the study found.
这项研究发现，在细菌污染方面，食品与地面质材的组合与食品接触地面的时长几乎同等重要。
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