carcinogenic chemicals

例句：

1. 1. The chemicals used in the manufacturing process are known to be carcinogenic.
   在生产过程中使用的化学物质已知是致癌的。
2. 2.The study found that exposure to certain carcinogenic substances can increase the risk of cancer.
   研究发现，某些致癌物质的暴露会增加患癌症的风险。
3. 3. The government has banned the sale of many carcinogenic substances in order to protect public health.
   政府已禁止销售许多致癌物质，以保护公众健康。