2[2]Ungerer F. & Schmid H. J. An Introduction to Cognitive Linguistics [M]. Foreigu Language Teaching and Research Press, 2001.
3[3]Taylor, John R. Linguistic Categorization: Prototypes in Linguistic Theory[ M]. Foreign Language Teaching and Research Press, Oxford University Press, 2001.
4[4]Langacker R. Foundations of Cognitive Grammar, Vol. 1 [M].Standford: Stanford University Press, 1986.
5[5]Lakoff, G. Women, Fire and Dangerous Things [M]. Chicago:Chicago University Press, 1987.