The green indicates the presence of complex molecules called polycyclic aromatic hydrocarbons .

绿色则表明了大分子多环芳香烃的存在。

There 's also concern that fat dripping from meat onto hot coals , stones or burners creates additional carcinogens called polycyclic aromatic hydrocarbons .

还有一个要担忧的问题：肉类的油脂滴落在热烫的煤炭、石头或者炉子上会产生另一种致癌物质多环芳烃。

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，那是一种鱼。

Using 12 volunteer smokers , scientists tracked pollutants called pahs , or polycyclic aromatic hydrocarbons , that are carried in tobacco smoke and can also be found in coal-burning plants and in charred barbecue food .

科学家们邀请了12位志愿者用以追踪有毒物质pahs（多环芳香烃），该物质由吸烟进入人体内，它们也存在于燃煤电厂和烤焦的烧烤食品中。

Research conducted by columbia university links " combustion-related " chemicals called polycyclic aromatic hydrocarbons ( pahs ) with shorter gestation periods for pregnant women , resulting in smaller babies .

由美国哥伦比亚大学进行的研究表明，在与燃烧有关的化学物质多环芳烃（pahs）和妊娠时间较短的孕妇（造成婴儿较小）之间存在联系。