致癌物质

例句：

1. 1. Exposure to certain chemicals can increase the risk of developing cancer.
   暴露于某些化学物质可能会增加患癌症的风险。
2. 2. The study found that some pesticides are carcinogenic.
   研究发现，一些农药是致癌的。
3. 3. Cancer is a disease caused by the accumulation of damaged cells in the body.
   癌症是一种由身体内受损细胞积累引起的疾病。