【摘 要】
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There are many active substances in natural resources.After years of research,researchers at home and abroad have extracted active compounds and proved that these compounds have low toxicity and high efficiency,but the toxicity of these compounds cannot b
【机 构】
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SchoolofPublicHealth,Xi\'anXinchengDistrictCenterforDiseaseControlandPrevention,TheSecondAffiliate
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There are many active substances in natural resources.After years of research,researchers at home and abroad have extracted active compounds and proved that these compounds have low toxicity and high efficiency,but the toxicity of these compounds cannot b
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