5Ellis. R. The study of second language acquisition[M]. Oxford University Press, Oxford: 1994:546-549.
6McCreary, D. 2002 American freshmen and English dictionaries: I'had aspersions of becoming an English teacher[J]. International Journal of Lexicography 3: 194-95.
7Miller, G & P. Gildea 1987. How children learn words [J]. Scientific American 3: 94-9.
8Nesi, H. & P. Meara 1994. The role of illustrative examples in produetive dictionary use[J]. Dictionaries 17: 198-206.
9O'Malley, J.M.,&Chamot, A.U. Learning strategies in second language acquisition[M]. New York: Cambridge University Press, 1990:119.