subject index entry

例句：

1. 1. The library has a comprehensive subject indexthat helps students find information quickly.
   图书馆有一个全面的主题索引，帮助学生快速找到信息。
2. 2. The research paper is based on thelatest subject index entries from the database.
   这篇研究报告基于数据库的最新主题索引条目。
3. 3. Theteacher used the subject index to guide thestudents in their research.
   老师利用主题索引指导学生们的研究。