通过自建语料库,以语类分析为基础,对中外医学研究性论文英文摘要的语步模式与语篇特征进行了对比研究。结果显示本族语者更强调研究背景的介绍,多采用BMRC模式,而中国作者倾向直入研究目的的OMRC模式。中刊摘要存在信息密度较低、缺少“背景”语步等问题。 By means of self-built corpus and based on genre analysis, the contrastive study of the step patterns and discourse features of the English abstracts of Chinese and foreign medical research papers is carried out. The results show that native speakers are more emphasis on the introduction of the research background, more use of BMRC model, while Chinese authors tend to direct research into the OMRC model. There is a low density of information in the journal summary, the lack of “background ” pace of language and other issues.