The different ch aractors and the difference in use of Pubmed and the Medline from BMN are compar ed through some cases,the influences to research result are discussed.

• 通过实例研究 ,比较了PubMed与BMN上的Medline数据库的不同特点和在使用上的差异 ,分析了这些差异对检索结果的影响。