universalgrammar
【正确答案】：Universalgrammar,alsoknownasprinciples?and?parameterstheory,isasystemoflinguisticknowledgeandahumanspecies?specificgiftwhichexistsinthemindorbrainofanormalhumanbeing.Itconsistsofasetofgeneralconditions,orgeneralprinciples,thatgeneratephrasesandatthesametimerestrainthepowerofMoveα,thuspreventingthisrulefromapplyingincertaincases.UGalsocontainsasetofparametersthatallowgeneralprinciplestooperateincertainways,accordingtowhichparticulargrammarsofnaturallanguagesvary.