The recent situation for the researches on chemical carcinogens and on the mechanism of chemical carcinogenesis is reviewed in this paper.
2
—深色染发剂：已被证明含有致癌化学物质煤焦油。
Dark hair dyes: They are known to contain coal tar, a carcinogenic chemical.
3
就连饮食中的苏打也有危险，因为其中为弥补缺失的糖分而添加的化学剂就有致病致癌的危险。
Even diet soda carries risks, as it's made with a lot of chemicals to make up for the lack of sugar, and these have been linked to diseases and cancers.
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