Whether it plays an role in the hydrogen-producting, it remains more study.
乳杆菌能否在制氢中发挥作用，还要进一步研究。
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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