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

室内空气污染的源头性有机化合物（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，一个腔室内含有性物质的样本，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.

性有机化合物使烟雾散出刺鼻的独特气味。

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。这意味着要能闻到什么，气味必须性的，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.

沃尔夫和他的同事们（通过在实验室分离相邻培养皿中各种寄生于奶酪的真菌和细菌）来确定微生物之间的相互作用。微生物之间不能相互接触，它们只能通过放的性化合物进行相互作用。

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.

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

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，如果在烹饪香料，放出那些奇妙的、芳香的、性的味道，这很重要，但如果慢慢地低温烹调，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的电阻器阵列，当暴露于性有机化合物的特定混合物时中，每个电阻器的电阻都会改变。

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.

因此我们做的就允许检测目标进入设备, 然后我们回提取希望测量的性有机化合物, 在这种测试下丙酮。

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.

当饥饿的毛毛虫出现时，受伤的叶子会放性化学物质，而其他叶子会嗅出这些信号并开始制造有毒化合物，使它们的胃口变小。

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 的一项研究中测试了 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的每一种性有机物。

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

鉴于狗狗敏锐的嗅觉，科学家们认为，犬科动物可以闻到癌细胞放的性有机物。

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

这个从现得到的补充概念石头缺少值得注意的被科学家称之为“性成分”的东西。

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

她解说，这因为香草在母乳和一些配方奶粉中存在的性风味化合物之一。

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

通过空气，植物输送的一种性有机化合物的混合物，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性化学元素，在如此靠近太阳的地方，其浓度之高没有人到的。

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的性有机化合物（例如乙醇）之外，细胞的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性有机物，也就 VOCs 的范畴。

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

汽油和柴油都性燃料，尽管汽油的性更强。

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

出现烟雾和空气污染时，还会吸入性有机化合物。