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This is Scientific American 60-Second Science. I'm Erika Beras. Got a minute?
这是科学美国人60秒科学。我是Erika Beras。有一分钟？
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The dust that accumulates in the corners of your house does more than just cause allergies and aggravation,
积聚在房子角落的灰尘不仅会引起过敏和恶化，
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it's also teeming with clues about where you live and who you live with.
它也充满了关于你住在哪里和你住在哪里的线索。
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That's the finding of a study in the Proceedings of the Royal Society B.
这是“皇家学会学报B”中一项研究的结果。
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Researchers had volunteers at nearly 1,200 homes across the U.S.collect indoor and outdoor dust samples.
研究人员在美国收集的室内和室外灰尘样本中的近1200个家庭中有志愿者。
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The average home's dust contains about 5,000 types of bacteria and 2,000 types of fungi.
普通家庭的尘埃含有约5,000种细菌和2,000种真菌。
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The fungi gave away a lot about a home's location.
真菌放弃了很多关于家的位置。
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Different regions have different fungal populations, and thus so do houses within those regions.
不同的地区有不同的真菌种群，因此这些地区的房屋也是如此。
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For example, dwellings around the Great Lakes had very different fungi than did homes in Arizona,
例如，五大湖周围的住宅与亚利桑那州的住宅有非常不同的真菌，
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because most household fungi originate outside and come in either on people's clothes or through windows and doors.
因为大多数家用真菌都来自外面，无论是穿在人们的衣服上还是通过门窗进入。
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As for the bacteria, those were strong indicators of the identity of the home's residents.
至于细菌，那些是家庭居民身份的强有力指标。
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Much of the bacteria was shed by the human body and was a pretty good indicator of a home's gender ratio.
大部分细菌都是由人体排出的，是家庭性别比例的一个很好的指标。
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The single-celled organisms also showed whether a pet shared the home, cats and dogs make their own contributions to the indoor bacterial menagerie.
单细胞生物也表明宠物是否共享家庭，猫和狗为室内细菌动物园做出了自己的贡献。
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The research could inform forensic investigations and allergy studies.
该研究可以为法医调查和过敏研究提供信息。
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In the meantime, what can we take from these findings?
与此同时，我们可以从这些发现中得到什么？
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Well, you can clean up dust but you can't change its composition.
好吧，你可以清理灰尘，但你不能改变它的成分。
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That is, unless you move. Or make some changes in the pets and people you live with.
也就是说，除非你搬家。或者对宠物和你住的人进行一些改变。
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Thanks for the minute, for Scientific American 60-Second Science.I'm Erika Beras.
非常感谢科学美国人60秒科学。我是Erika Beras.