To study how a cigarette's contents impact human DNA, Hecht and his team used 12 volunteers to track PAHs, or polycyclic aromatic hydrocarbons, which are pollutants found in tobacco smoke.

为了研究香烟中的成分是怎样影响人类DNA的，赫克特和他的研究小组对12名志愿者进行了 PAH，即多环芳烃追踪。

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The Commission adopted the first guidelines for reducing polycyclic aromatic hydrocarbons (PAH) intake through final food preparation.

委员会通过了关于在食品最后制备过程中减少多环芳烃摄入的第一份准则。

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Stegeman has been chronicling resistance to toxic PCBs and polycyclic aromatic hydrocarbons in another coastal species, a killifish.

斯蒂门记录有另一种对有毒的多氯联苯和多环芳烃有抵抗作用海岸物种，那是一种鳉鱼。

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The water leftover from the extraction process, known as tailings, contains arsenic, mercury, napthenic acids and polycyclic aromatic hydrocarbons (PAHs).

BBC: Canada's 'dirty oil' challenge

The researchers looked at the level of chemicals linked with cancer, polycyclic aromatic hydrocarbons (PAH), in 12 patients after smoking.

BBC: Smoking

Fracking fluids are believed to contain, in addition to water, benzene, ethylbenzene, formaldehyde, methanol, naphthalene, polycyclic aromatic hydrocarbons, toluene, xylene, boric acid, hydrochloric acid, isopropanol, and diesel fuel.

FORBES: European Gas Giant Backs French Fear Of Fracking