And in many cases this dust is laced with complex molecules called polycyclic aromatic hydrocarbons.

在许情况下，这些尘埃中还夹杂着一种叫做环芳烃的复杂分子。

The kind of organic molecules observed are called polycyclic aromatic hydrocarbons, or PAHs.

这种被观测到的有机分子被环芳香烃。

They looked at chemicals known as polycyclic aromatic hydrocarbons, or PAHs, which are another by-product of combustion.

研究了被环芳烃的化学物质，这是燃烧的另一种副产品。

After cooking, they analyzed the chops for polycyclic aromatic hydrocarbons, or PAHs, which are found in smoked and grilled meats, and may up your risk of cancer.

烤好后，分析了这些排骨的PAHs, 即环芳香烃类物质，这些都是在烟熏火烤后肉类食物中已经被证实存在的化学物质，也许有致癌风险。

Conversely, burning wood or dung can create polycyclic aromatic hydrocarbons; dangerous compounds that have been linked to several types of cancer, as well as long-term DNA damage.

相反地，燃烧木头或粪肥会产生环芳香烃；它是危险的化合物，和种癌症和长期的 DNA 损伤有关。