简介:<正>Theconceptof"purity"and"pollution"existsineveryethnicgrouporculture,andtheemergenceandexistenceofthisconceptiscloselyassociatedwithgeographicenvironment,religiousbelief,modeofproduction,lifestyle,moralsandworldoutlook,andissupportedandrestrictedbyawholesetofculturallogicshiddendeeplyinthesocialstructure.Differentethnicgroupsandcultureshavedifferentcriteriaforclassificationof"purity"and"pollution".Onearticle,behaviororsocialphenomenonmaybedeemed"pure"byoneethnicgroup,but"polluted"byanother.Thehumanperceptionof"purity"isa