7BLOOMFIELD, L. Language [M]. New York: Holt, Rinehart and Winston, 1933:445.
8CRAIG, COLETTE G. Language Contact and Language Generation [M]//Florian Coulmas ed. The Handbook of So- ciolinguistics. Oxford: Blackwell Publishers Ltd, 1997:257 - 270.
9HALLIDAY, M. A. K . The Notion of "Context"in Language Education [M]//M. Ghadessey. Text and Context in Func- tional Linguistics. Amsterdam & Philadelphia: John Ben- jamins, 1999:1 - 18.
10KRAMSCH,CLAIRE. Language and Culture [M]. Oxford: Oxford University Press, 1998:65-72 .