求翻译：请毒理学是研究外源化学、物理和生物因素对生物体和环境生态系统的损害效应和机理，以及预防、救治或改善措施的综合性学科。毒理学学科特征：多元与集成并重、学术研究与服务管理并重、基础与应用并重。毒理学分类：基础毒理学、应用毒理学、管理毒理学等。输入您需要翻译的文本！是什么意思？

Toxicology is the study of exogenous chemical, physical and biological factors on eco-system effects and mechanism of damage in organisms and the environment, and measures of prevention, treatment or improvement of the integrated disciplines. Toxicology of subject characteristics: both diversity and integration, equal emphasis on academic research and service management, infrastructure and application and retry. Toxicological class: basic toxicology, applied toxicology, Regulatory Toxicology, etc. Enter the text you need to translate!