carcinogen|carcinogens

加工肉类被世界卫生组织归类为致癌物。

Processed meat is classified by the WHO as a ___carcinogen.

吸烟会释放多种致癌物质，对健康危害极大。

Smoking releases various ___carcinogens that pose serious health risks.

吸烟会释放多种致癌物，危害周围人的健康。

Smoking releases various ___carcinogens that endanger the health of people nearby.