6[17]Trubetzkoy,N.Die phonologischen systeme[J].Travaux du Cercle Linguistique de Prague 4(1931):96-116.
7[18]Zobl,H.Markedness and the projection problem[J].Language learning 33(1983):293-313.
8[2]Chomsky,N.Markedness and core grammar[A].In A.Belleti,L.Brandi & L.Rizzi(eds.)Theory of Markedness in Generative Grammar[C].Pisa,Italy:Scuola Normale Superiore,1981:123-146.
9[3]Coleman,L.& P.Kay.Prototype semantics:The English word‘lie'[J].Language 55(1981):26-44.
10[4]Dulay, H.& M.Burt. You can't learn without goofing [A]. In J.Richards (ed.)Error Analysis[C].London:Longman,1974.
