7Arnaud, Pierre J. L. & J. Savignon Sandra. Rare words,complex lexical units and the advanced learner [A]. Second Language Vocabulary Acquisition [C]. Eds. J. Coady &Thomas Huckin. Cambridge University Press, 1997. 157- 173.
8Carter, R. Vocabulary: Applied Linguistic Perspective [M].London: Allen & Unwin, 1987.
9Channell, J. Psycholinguistic considerations in the study of L2 vocabulary acquisition [A]. Vocabulary and language Teaching [C]. Eds. R. Carter & M. McCarthy. Essex:Longman, 1988.
10Gass, S. & L. Selinker. The Lexicon [M]. Hillsdale, NJ:Erlbaum, 1994.