4Ellis R. The Study of Second Language Acquisition[M]. Oxford: Oxford University Press, 1994. 被引量：1
5Brown H D. Principles of Language Learning and Teaching [ M ]. (3^rd edition). NJ: Prentice Hall Regents,1993.35. 被引量：1
6Krashen S. Principles and Practice in Second Language Acquisition[M]. Oxford: Pergamon Press, 1982. 被引量：1
7Schumann J. The Piginization Process : A Model for Second Language Acquisition[M]. Rowly, Mass. : Newbury House, 1978. 被引量：1
8Guion S G, J E Flege, S H Liu, & G H Yeni-Komshian. Age of learning effects on the duration of sentences produced in a second language[J]. Applied Psycholinguistics 2000, (21): 205- 228. 被引量：1
9Bialystok E. The structure of age : in search of barriers to second language acquisition[J]. Second language Research, 1997,(13):116- 137. 被引量：1
