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You've probably noticed that synthetic t-shirts stink more after a workout, compared to cotton.
你可能已经注意到，相比棉质T恤，运动过后合成纤维材质所散发的臭汗味更招人讨厌。
But hey—it's not the fabric's fault.
但是这可能并不是面料的原因。
It's the microbes that hang out on synthetics, that create that characteristic stench.
而是附着在合成纤维上的细菌所产生的特有恶臭。
That's according to a study in the journal Applied and Environmental Microbiology.
这是根据《应用与环境微生物学》杂志上的一篇研究所得出的结论。
Twenty-six volunteers—half men, half women—worked out on spinning bikes for an hour.
26名志愿者参加到这项动感单车运动1小时的测试，其中男女各占一半。
And they did so outfitted with shirts of cotton, polyester, or a cotton/synthetic blend.
他们所穿的T恤材料有棉质，涤纶，还有半合成棉质。
Then researchers stuffed the sweaty shirts into plastic bags.
运动过后研究人员们把志愿者穿过的T恤塞进塑料袋里。
The next day, a trained panel sniffed them, rating their funk.
第二天，一组经过训练的评判小组对这些T恤进行气味判断，然后依照等级进行评定。
Unlucky job.
这工作真是有够恶心的。
Because yes—the polyester shirts were indeed more musty, sour, and ammonia-like than the cotton.
结果显示涤纶衬衫确实比棉质衬衫更易散发出霉味，酸味及氨味。
DNA analysis revealed that Micrococcus bacteria were to blame.
而经DNA分析表明微球细菌是臭味的元凶。
They aren't actually all that common in the armpit itself.
这种细菌其实并不常见于腋下，
And they don't flock to cotton.
并且它们并不会在棉质材料上依附。
But researchers say they thrive on the open-air lattice of synthetic fibers—where they sit chomping on the long-chain fatty acids in our sweat, turning them into shorter, stinkier molecules.
但是研究人员表示它们可以在合成纤维中的开放网格环境下茁壮成长，这些细菌会大肆咀嚼我们汗液中长链的脂肪酸，将它们转变成短小的，散发恶臭的微粒。
These findings might just explain one of the most vexing questions of adolescence:
这一发现可以解释青春期最令人烦恼的一个问题：
why do stinky shirts smell so unpleasantly different from the body odor in the armpits themselves?
为什么衬衫的臭气熏天不同于腋下狐臭更令人不愉快?
Could be because your favorite shirt has a microbiome of its own.
可能就是因为你最钟爱的衬衫已经有属于自己的微生物群。
