本文依据费尔克劳(Fairclough)的批评话语分析三维模式,以韩礼德(Halliday)的系统功能语法作为理论基础,通过描写、阐释、解释三个步骤,对奥巴马总统的演讲加以批评分析,发现其意识形态、权力关系和演讲的真正意图。 Based on Fairclough’s three-dimensional model of critical discourse analysis and Halliday’s system functional grammar as the theoretical basis, this dissertation analyzes and criticizes President Obama’s speech through three steps of description, explanation and interpretation. The true intentions of ideology, power relations, and speech.