英语语法分析

On Earth, polycyclic aromatic hydrocarbons are found on burnt toast and in automobile exhaust.

在地球上，烤糊的面包和汽车尾气里都含有稠环芳烃。

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。

Pollutants in cigarettes called PAHs (polycyclic aromatic hydrocarbons) can cause genetic damage in minutes.

香烟中的污染物质PAHs(多环芳香烃)会在几分钟内对基因造成损害。