initiating carcinogen

• 引发致癌因子

initiating carcinogen的用法和样例：

例句

1. The term of chronic irritation as a carcinogen is so vague that it is not easy to discuss.
   慢性刺激作为致癌因子，其意义是如此含糊以致不易加以讨论。
2. The most promising approach is to look for biomarkers such as the carcinogen pyrene in body fluids like urine.
   最有前景的进展是在尿液等体液中寻找类似致癌因子的生物标记物。