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烃复杂分子。

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

这种被观测到有机分子被称为香烃。

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

他们研究了被称为烃化学物质，这是燃烧另一种副产品。

The simplest aromatic hydrocarbon (and one of the most common) is benzene (C6H6).

最烃（也是最常见一种）是苯 (C6H6)。

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，他们分析了这些排骨PAHs, 即香烃类物质，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香烃；它们是危险化合物，和种癌症和长期 DNA 损伤有关。