世界卫生组织指出,人类癌症有90%与环境因素有关,其中最主要的是化学因素。人类环境中已登记的化学物质就有400余万种,且每年仍以约30万种的速度增加。鉴定环境中如此浩瀚的化学物质是否致癌,已成为当前一个十分迫切的任务。传统动物致癌实验法耗资费时,且敏感性差,远不能满足需要。以 The World Health Organization pointed out that 90% of human cancers are related to environmental factors, the most important being chemical factors. There are more than 4 million registered chemical substances in the human environment and they are still increasing at a rate of about 300,000 species per year. It has become a very urgent task to identify whether such a vast amount of chemicals in the environment are carcinogenic. Traditional animal carcinogenic experiments are time consuming and have poor sensitivity, and they are far from meeting the needs. To