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洗澡时放的屁为什么会更臭

Why Do Your Farts Smell Worse in the Shower?

【音乐】
[♪ INTRO]
即使你不热衷于讨论这个话题 说白了 我不明白
Even if you’re not a huge fan of talking about it, and to be clear I don’t understand
什么东西让我 你还有每个人放屁
what that impulse, you, me, and everybody else farts,
平均每人一天放屁的次数达到20次
and the average person does it up to 20 times a day.
大多时候放的屁都闻不到 但如果你在洗澡时放了一个屁
Most farts don’t smell that great even on a good day, but if you’ve ever let one rip
你可能发现闻起来会更臭
in the shower, you might know that they can smell worse in there.
为什么会这样
Why?
早上 你自己热烘烘的臭屁绝对能够臭醒你
Nothing wakes you up in the morning like a nice, hot noseful of your own butt gas.
之前 我们在《科学秀》上对放屁做过诸多讨论 如果你想知道
We’ve talked quite a lot about farting before on SciShow, and if you want to know what makes
是什么让屁发出臭味 可以通过我们的节目来找出原因
them smell the way they do, you can watch our episode about it.
主要 还是多亏了寄生在你肠子里的细菌
Mostly, you can thank bacteria living in your gut,
制造出了大量难闻的化学气体
which produce a bunch of lovely, gross-smelling chemicals.
这些气体在你洗澡的时候 闻起来更臭
And the smell just seems to get worse when you take a shower.
有的是因为你困在封闭的空间里 无法活动
Some of that is because you’re stuck in a closed space and there’s nowhere for you
气体无法散发 跟你在开阔的场所
or the gas to go, unlike if you farted in a nice open field
或者在搭电扶梯时放屁不一样
or while you’re traveling down an escalator.
它奇臭无比的主要原因是它的湿度增加了
The main reason it smells especially bad is because of the added humidity.
你的嗅觉是非常重要的
Your sense of smell is super important.
嗅觉有助于判断食物的好坏 是否有气体泄露
It helps you figure out if your food’s gone bad, if there are gas leaks,
或许周围是否发生火灾 因此研究人员反复研究 以便深入了解
or if there’s a fire nearby, so researchers have been trying to better understand it.
在一个实验中 他们让75个志愿者进入一个房间里 随后 他们改变了室内的湿度
In one experiment, they put 75 volunteers in a room and they changed the room’s humidity
改变了室内气压 来知悉不同的环境如何影响我们的嗅觉
and air pressure to learn how different conditions affect how we smell things.
他们没有刻意让志愿者放屁 尽管那样很雷人
They did not make the subjects fart, although that would’ve been amazing
我希望有朝一日有人会做这类研究
and I hope somebody does that study someday.
但他们有让志愿者闻其他的气味 他们还发现当室内的湿度越高
But they did introduce other odors, and they found that when the room was more humid, the
志愿者的嗅觉对气味的敏锐度越高
volunteers could smell much lower concentrations of the odors.
特别是 空气里的水蒸气越多 嗅觉越灵敏
Essentially, their sense of smell got better when there was more water vapor in the air.
早前 没有多少研究注意到这点
Not many studies have looked at that before,
因此科学家对此种现象也是一知半解
so the scientists weren’t really sure why this happens.
一种可能是水蒸气能促使
One possibility is that the water vapor helps the molecules
气味里的分子与我们鼻子里的神经末梢发生反应
that make up the smell interact with receptors in your nose.
另一种观点是气体微粒与水蒸气混合后 空气的作用
Another idea is that the gas particles bind to the water vapor, so the air acts like
跟海绵类似 比平常干燥的空气更能留住气味
a sponge and can hold more smell than regular, dry air.
洗热水澡时 卫生间满是湿润的水蒸气
When you take a hot shower, your bathroom fills up with steamy water vapor,
因此这种情况下 味道变得更重
so one way or another, that gross smell ends up being a lot stronger.
就算是不穿衣服 也可能没有多大的作用
It also probably doesn’t help that you aren’t wearing clothes,
因此没有哪种布料能吸收或留住气味 然而 你可能又会推测
so there isn’t any fabric to absorb the smell or lock it in, but, as you probably would guess,
研究人员还没对这一猜想做过深入研究
researchers have not done many studies on that yet.
不管怎样 下次你想要放屁时
Either way, the next time you feel the need to let one go,
可能你会憋到洗完澡后再放
you might want to wait until you’re out of the shower.
你也许会感激你这个明智的决定
You probably will thank yourself.
尽管这样 至少这里只是你一个人 没有人会知道
Though, at least it’s just you in there, no one else has to know.
感谢您的咨询 感谢众筹平台的赞助者为我们解答
Thanks for asking, and thanks to our patrons on Patreon for helping us answer
这类各种各样奇怪的 有深度的问题
all sorts of weird, awesome questions like this one.
如果你有任何问题或者想支持我们的节目
If you have a question or want to support the show,
访问patreon.com/scishow 这个网站
you can check us out on patreon.com/scishow.
【音乐】
[♪ OUTRO]

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视频概述

同样是放屁,洗澡时放的屁为什么会比平常时放的屁更臭呢?个中原因还真是可以用科学原理解释呢……

听录译者

收集自网络

翻译译者

Nacy廖

审核员

审核员W

视频来源

https://www.youtube.com/watch?v=B3zqFJDJf2Q

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