3[3]Joanna Channell.Vague Language[M].Oxford:Oxford University Press.1994.165-195.
4[4]Grice,HP.Logic and Conversation In Cole,P.and Morgan,J (eds.) Syntax and Semantics [C].New York:Academic Press,1975.21-37.
5[5]Leech,GN.Principles of Pragmatics[M].London:Longman,1983.131-140.
6[8]赵静.广告英语[M].北京:外语教学与研究出版社,1993.102-119.
7[1]Kitty O.Locker,Business and Administrative Communication (6th Edition),Beijing:China Machine Press,2005.
8[2]陈苏东,陈建平.商务英语写作[M].北京:高等教育出版社,2002.
9程润明,程洁.国际贸易交际技巧[M].上海:上海外语教育出版社,1992.
10Pince, E.F., Frader, J. & Bosk, C. On Hedging in Physician - Physiciag Discourse [A]. In di pietro, R.J. Linguistics and the Professions[C]. Norwood: Ablex, 1982.