Poison-evil is one of important pathogenic factors, which canaffect human's body as exogenous factor or endogenous factor.
毒邪是一类重要的致病因素，既可由外侵入，又可由内而生。
Poison-evil is one of important pathogenic factors, which canaffect human's body as exogenous factor or endogenous factor.
毒邪是一类重要的致病因素，既可由外侵入，又可由内而生。
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