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致癌作用是一个极为复杂的过程,当前的认识,至少包括起始作用和促进作用两个阶段。由于人类肿瘤与环境有密切关系,其中化学物质对环境污染占重要地位。人类生活的环境中,接触的化学物质空前复杂,据研究,致癌的化学物质有多种多
Carcinogenesis is an extremely complex process. Current understanding includes at least two stages: initiation and promotion. Due to the close relationship between human tumors and the environment, chemical substances play an important role in environmental pollution. In the environment of human life, the chemical substances exposed are unprecedentedly complicated. According to the research, there are many kinds of carcinogenic chemicals