The two film mass transfer model was used to estimate the volatilization coefficients and half life of the fourteen volatile organic chemicals(VOCs) detected in Dalian Bay.

本文采用气液双膜模型和大连湾水文参数，对大连湾检测出的挥发性有机物的挥发速率常数进行估算。

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

植物通过空气输送的是一种名为挥发性有机化合物（简称VOCs）的化学混合物。

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These same processes also release chemicals that combine in sunlight to form ozone: methane, nitrogen oxides, volatile organic compounds, and carbon monoxide.

这些燃烧过程同样释放化学物质如甲烷、氮氧化合物、挥发性的有机化合物和一氧化碳在光照下反应形成臭氧。

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The city council said it had been checking the air for "volatile organic chemicals" (VOCs), which can be harmful, but it said amounts being released were within safe limits.

BBC: Portsmouth site clearing fumes 'making residents ill'

The breath-test technology relies on the idea that the biology of tumours can lead to the production of specific "volatile organic compounds", combinations of chemicals unlikely in a healthy person.

BBC: 'Promising results' for bowel cancer breath-test