It might have flown out of a factory smokestack, or a truck's tailpipe.

它可能是从工厂烟囱里飘出来的，或从卡车的排管。

What's more, because children are smaller and closer to car exhaust pipes, smog affects them most. In winter, the air in Delhi gets so bad they have to close the schools, sometimes for weeks.

此外，由于儿童体型较小，距离汽车排管较近，雾霾的影响最大。冬天，德里的空质量非常糟糕，学校不得不停课，有时甚至停课数周。

Fixes the plastic tube tightly over the exhaust pipe.

把塑料软管牢牢地固定在排管上。

Yeah, we have the tailpipe now on display in Darwin Minnesota.

是的，我将这个排管展出在明尼苏达州的达尔文市。

But no; with one mighty tug he finally wriggled through. Down the long pipe came a gust of night wind. Tim almost screamed for joy.

但没有，用很大的劲最终进入了，长长的排管涌来了夜晚的风，蒂姆几乎要喜悦地尖叫起来。

And one of the most significant drivers of air pollution in cities is exhaust that comes out of tailpipes from cars, trucks and buses.

城市空污染的最主要原因之一，就是从小汽车、卡车和公交车排管排出的。

Last step, exhaust valve opens, piston travels up, it forces that spent burnt gases out your exhaust pipe, out into the atmosphere.

最后一步，排阀打开，活塞向上移动，它迫使燃烧过的体从排管向下进入大。

One lung researcher compared smoking cigarettes to putting your mouth over a car exhaust pipe and inhaling.

一位肺部研究员将吸香烟比作把嘴放在汽车排管上吸。

Air pollution outside is easy to spot, hanging over the city, or sputtering from a tailpipe.

室外空污染很容易看出来，污染物悬浮在城市上方，或者从排管溅射出来。

To absorb it, we would need to fill containers with potassium hydroxide and shake them continually.

吸收碳酸，要把氯化钾放在排管中，不停地摇动玻璃管。

You wanted to see if your head would fit in the tailpipe.

你想看看你的头能不能合适地塞进这个排管。

And then the shape of the nozzle at the back end of the jet engine makes sure we get the most push out of that exhaust.

然后喷发动机后端的喷嘴形状确保我从排管中获得最大的推力。

In a few minutes more he was at the end of the tube, and had tumbled in a heap into the factory yard.

几分钟后，来到了排管的末端，一屁股坐在了工厂院落里。

In a way, Tom, it's your fault for having an irresistible tailpipe you know.

在某种程度上，汤姆，你错在有一个极为诱人的排管你知道吗。

Please welcome Kaitlin strom and the owner of the truck, too, Tom.

让我有请凯特琳·斯特罗姆和这个排管的主人汤姆。

Look and behold, it did fit in the tailpipe.

你瞧，它确实能装在排管里。

And that tailpipe is now on display at a bar in Minnesota.

这个排管现在在明尼苏达州的一家酒吧里展出。

Strom posted a picture of herself holding the tailpipe on Facebook.

斯特罗姆在她的脸书上贴出了她自己举着排管的照片。

These same pollutants are released from car tailpipes.

这些相同的污染物从汽车排管中释放出来。

So this is your tailpipe, that's where the emissions come out.

所以这是你的排管，排放物就是从那里排出的。