癌症的发病原因很复杂,现在很多专家认为比较成熟的是多阶段致癌学说。即一些有毒物质污染了你所吃的食物或被吸入体内,例如:黄曲霉素、亚硝胺,或香烟中的煤焦油、自由基等。这些物质作为起动剂使细胞基因中的脱氧核糖核酸(DNA)被活化,发生突变,使细胞变成静止型的或称潜伏的癌细胞,这是第一个阶段即起动阶段。要使这一 The cause of cancer is very complicated. Many experts now think that the more mature is the multi-stage cancer theory. That is, some toxic substances contaminate the food you eat or are inhaled, such as: aflatoxin, nitrosamines, or coal tar, free radicals, etc. in cigarettes. These substances act as a priming agent to activate the DNA in the cell gene, mutate and turn the cells into stationary or latent cancer cells. This is the first stage, the start-up phase. To make this