求翻译：环境的不良侵害会受到人体防护系统的缓冲或抵抗，其作用能被消除或减弱。当致癌因素过强或累积效应过大，而人体存在免疫功能不足或身体修复功能有缺欠情况下，就有可能发生癌症。是什么意思？

Environment of bad practices will be buffered or resistance of human body protection system, which can be eliminated or reduced. Cumulative effect too strong or too large when the carcinogenic factors and immune function of human deficiencies or physical repair missing cases, cancer is likely to occur.