Now, a tumor develops if there's a DNA mutation in any of these cell types that leads to uncontrolled cell division.

如果以上提到的这些细胞发生DNA突变，造成细胞分裂失控，就会发展为肿瘤。

They’re based on models of DNA mutation rates, our records of historical events, and some educated guesswork.

它们基于 DNA 突变率模型、我们的历史事件记录以及一些有根据的猜测。

But those oxides of nitrogen, bonded to amino acids, can form these N-nitroso compounds, which are MASSIVELY bad for you and SUPER good at causing the DNA mutations that can lead to cancer.

但是那些与氨基酸结合的氮氧化物可以形成这些 N-亚硝基化合物，这些化合物对您非常有害，并且非常擅长引起可导致癌症的 DNA 突变。