RESUMEN
At present,Traditional Chinese Medicine (TCM) researchers and educators have not paid enough attention to relativity in the expression of TCM,so that the efficacy and clinical application methods of herbs cannot be accurately understood,causing some misleading and obstacles for clinical application and new drug discovery.This study analyzed reasons of relativity in TCM,and put forward the correct cognitive and comprehension approaches by exploring relativity of clinical diagnosis and basic theory of prescriptions.At the same time,this article focused on the relativity in the expression of efficacy of herbs,such as similar drug efficacy,efficacy intensity,site expression,efficacy description,efficacy system,efficacy level,efficacy and drug variety,toxicity and energy,efficacy and dosage forms,administration pathways.In addition,this article analyzed relativity in the expression of herbal properties,including primary and secondary relations,four properties of drugs,channel tropism,five flavours,and concerted application.Cognizing relativity in the expression of TCM with thinking way of TCM provides enlightenment for TCM researchers.