It's caused by volatile organic compounds, or VOCs.

室内空气污染源头是挥有机化合物（简称为VOCs）。

Each insect was placed for five minutes in an apparatus that had two chambers, one of which contained a sample of the volatiles and the other an odourless control.

每只昆虫都被放置在一个两室装置内五分钟，一个腔室内含有挥物质样本，另一个则毫无气味，以此作为实验对照。

That's what gives smoke its sort of acrid, distinct smell.

挥有机化合物使烟雾散出刺鼻独特气味。

Now, the process starts as I sniff molecules up into my nose. This means that for you to be able to smell something, the odorant must be volatile, or in a gaseous state to get sucked up into your nostrils.

现在，当我把分子吸进鼻子时，这个过程就开始了。这意味着你要能闻到什么，气味必须是挥，或者处于气态，被吸进鼻孔。

Wolfe and his colleagues identified the microbial interactions by growing various cheese-dwelling fungi and bacteria in separate but adjacent dishes in the lab. The microbes couldn't touch-they could interact only via the volatile compounds they released.

沃尔夫和他同事们（通过在实验室分培养皿中各种寄生于奶酪真菌和细菌）来确定微生物之间互作用。微生物之间不能互接触，它们只能通过释放挥化合物进行互作用。

You know, we've really only understood plate tectonics for the last 50 or so years, and we have carbon and water and other volatiles moving between the Earth's surface and interior in this very dynamic system.

我们是在过去 50 左右才真正了解了板块构造：我们有碳、水和其它挥物质在地球表面和内部这个非常动态系统中移动。

Bear in mind, if you are cooking spices, you want to release those fantastic, aromatic, volatile flavours, that's important, but if you do it low and slow, you keep control.

记住，如果你在烹饪香料，你想释放出那些奇妙、芳香、挥味道，这很重要，但如果你慢慢地低温烹调，你就可以掌控。

Others use an array of resistors made of different materials that each change their resistance when exposed to a certain mix of volatile organic compounds.

其他人则使用由不同材料制成电阻器阵列，当暴露于挥有机化合物特定混合物时中，每个电阻器电阻都会改变。

So, what we do is allow the subject to blow into the device, we extract out the volatile organic compound we wish to measure, in this case acetone.

因此我们做就是允许检测目标进入设备, 然后我们回提取希望测量挥有机化合物, 在这种测试下是丙酮。

When hungry caterpillars show up, injured leaves release volatile chemicals, and other leaves sniff out those signals and start making toxic compounds, so, they're less appetizing.

当饥饿毛毛虫出现时，受伤叶子会释放挥化学物质，而其他叶子会嗅出这些信号并开始制造有毒化合物，使它们胃口变小。

A 2009 study tested 28 varieties of indoor plants and found four that were best at capturing every VOC the researchers threw at them.

2009 一项研究中测试了 28 中室内植物，现其中有四种最善于捕获研究人员扔给它们每一种挥有机物。

Given a dog's acute sense of smell, scientists think canines can pick up on volatile organic compounds that cancer cells give off.

鉴于狗狗敏锐嗅觉，科学家们认为，犬科动物可以闻到癌细胞释放挥有机物。

This notion was reinforced by the discovery that the rocks were lacking significantly in what scientists call " volatile elements" .

这个从现得到补充概念是石头缺少值得注意被科学家称之为“挥成分”东西。

That, she explains, is because vanilla is one of the volatile flavour compounds present in breastmilk, as well as some formulas.

她解释说，这是因为香草是在母乳和一些配方奶粉中存在挥风味化合物之一。

What the plants pump through the air is a mixture of chemicals known as volatile organic compounds, VOCs for short.

通过空气，植物输送是一种挥有机化合物混合物，简称 VOCs。

The tiny probe detects volatile chemical elements in concentrations that no one had thought possible this close to the sun.

这个微型探测器能探测到挥化学元素，在如此靠近太阳地方，其浓度之高是没有人想到。

In addition to the volatile organic compounds like ethanol we consume in food and drink, the biochemical processes of our cells produce many others.

除了我们在食物和饮料中消耗挥有机化合物（例如乙醇）之外，细胞生化过程还会产生许多其他元素。

Those chemicals fall under the broader umbrella of volatile organic compounds, or VOCs.

这些化学物质都属于挥有机物，也就是 VOCs 范畴。

Both gasoline and diesel are volatile fuels, though gasoline is the more volatile of the two.

汽油和柴油都是挥燃料，尽管汽油挥更强。

With smoke, and air pollution, you also have volatile organic compounds.

出现烟雾和空气污染时，你还会吸入挥有机化合物。