1Swain M,Lapkin S.Problems in output and the cognitive processes they generate: a step towards second language learning[].Applied Linguistics.1995
2Carroll,David W.Psychology of Language[]..2000
3Potter,M.CSo,,K.F.yon Eekardt,B.,and Feld- man,L.B."Lexical and conceptual representation in beginning and proficient bilinguals"[].Journal of Verbal Learning & Verbal Behaviour.1984
4Sunderman,G,&Kroll,J.First Language Activation During SecondLanguage Lexical Processing[].Studies in Second Language Acquisi-tion.2006