This paper discusses the differences between American English and British English in phonetics,vocabulary and grammar concisely and systematically,and analyzes the main causes leading to the differences.

• 简明而又系统地论述了美国英语和英国英语之间在语音、词汇和语法方面的差异,并从美国历史变迁和经济发展的视角,分析了产生两种语言差异的主要原因。