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

室内空气污染的源头是挥发性有机化合物（简称为VOCs）。

It's like just they've been heated and they've lost a lot of their volatile elements.

就像被加热过的，就像失去了挥发性成。

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

这些化学物质都属于挥发性有机物，也就是 VOCs 的范畴。

Some VOCs are known to cause health issues like headaches or liver and kidney damage.

已知的一些挥发性有机化合物会导致头痛或肝脏肾脏损害等问题。

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

出现烟雾空气污染时，还会吸入挥发性有机化合物。

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

挥发性有机化合物使烟雾散发出刺鼻的独特气味。

And some examples of volatile elements include water or potassium for example.

挥发性成一些例子包括水或钾等等。

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

汽都是挥发性燃料，尽管汽的挥发性更强。

Volatile elements are those that can evaporate easily and they're for be lost when you heat up a rock.

挥发性成是那些容易挥发的元素，是在加热石头时会消失的。

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

通过空气，植物输送的是一种挥发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挥发性化学元素，在如此靠近太阳的地方，其浓度之高是没有人想到的。

Messenger's evidence of the volatiles on Mercury's surface and the unusual size of its core suggests an interesting new theory.

“信使号”关于水星表面的挥发性物质及其核心异常大小的证据表明了一个有趣的新理论。

While volatility is inherent to the fuels by nature, the use of additives increases this volatility for better combustion characteristics.

虽然挥发性本质上是燃料固有的，但添加剂的使用增加了这种挥发性，以获得更好的燃烧特性。

And when something disrupts those processes, like a disease, the collection of volatile organic compounds in the breath may change, too.

当某种东西（如疾病）破坏这些过程时，呼吸中的挥发性有机化合物也会发生变化。

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

这个从发现得到的补充概念是石头缺少值得注意的被科学家称之为“挥发性成”的东西。

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

她解释说，这是因为香草是在母乳一些配方奶粉中存在的挥发性风味化合物之一。

Scientists have found that all kinds of plants give out VOCs when being attacked. It's a plant's way of crying out.

科学家发现，各种植物在受到攻击时都会释放出挥发性有机化合物，这是一种植物的呼救方式。

This chemical is volatile, that is, it easily evaporates at normal temperature, forming a gas.

这种化学物质具有挥发性，也就是说，它在正常温度下很容易蒸发，形成气体。

Water, carbon dioxide, and volatile gases combine to create smoke.

水、二氧化碳挥发性气体结合生成烟雾。

These biogenic volatile organic compounds are how the forest makes its own rain.

这些生物挥发性有机化合物是森林自己降雨的方式。