A PAH was added to the subject's cigarettes, which was then modified by the body and turned into another chemical which damagesDNA and has been linked with cancer.
研究对象的香烟中添加了一种多环芳烃化合物,该物质进入人体后被转化为另一种破坏dna的致癌化学物质。
2
Earth's ozone layer protects life by absorbing ultraviolet light, which damagesDNA in plants and animals (including humans) and leads to skin cancer.