5Nation, I S P. Teaching and learning Vocabulary[M].New York: Newbury House, 1990.
6Parry, K.Building a vocabulary through academic reading[M]. TESOL Quarterly,1991.25: 629-653.
7Ahmed, O. Vocabulary learning strategies.[A].In P. Meara (Ed).Beyond Words [C].Papers from the Annual Meeting of the British Association for Applied Linguistics Held at the University of Exter. 1989, (9): 3-14.
8O'Malley, J. and A. Chamot (eds.).Learning Strategies in Second Language Acquisition[M].Cambridge: CUP.1990.
