中文摘要：

本文基于 Biber 的多维度话语分析模式，运用语料库方法从交互性与信息性、叙事与非叙事、所知清楚与所指依赖场景、显性劝说性、客观抽象与个人化、和即时详细信息等六个维度上探讨外交场合下的口译话语与面对面交谈、采访、新闻报道、官方文献和科普文章在各维度上的变异。研究结果表明：口译与面对面交谈、采访等口语语篇在六个维度上具有显著差异。综合来看，口译语篇显示了大量的书面语特征，有一定的书面语趋向。口译语篇交互性不强，语体正式，通过较复杂的句式、修饰性形容词和介词词组等语法手段来传达大量的信息，具有非叙事性、所指清楚的特点，语体不具有抽象性、属于非个人化风格，在功能上带有一定的劝说性。

英文摘要：

Based on Biber’s MD analysis, this research studies the stylistic features of diplomatic interpretation discourses by comparing the factor loadings and dimension scores on six dimensions among interpretation, face to face conversation, interview, news broadcasting, government documents and scientific articles. The findings are as follows： there are significant differences between interpretation and other spoken discourses including face to face conversion, interview, and news broadcasting. On the whole, interpretation discourses demonstrate a lot of stylistic features typically and exclusively belonging to written discourses. Specifically, interpretation discourses display the following features： （1） formal style with weak involved stylistic features; （2） conveying a huge wealth of information through complicated sentence structure, attributive adjectives and prepositional phrases, etc.; （3） non-narrative discourse with explicit reference and impersonal, non-abstract and online elaborat-ed information; and （4） overt persuasive function through expressions of persuasion such as suasive verbs, prediction modals, necessity modals, etc.