keyword index meaning in English

关键词索引
关键字索引

Obviously keyword indexing can significantly reduce the storage space
显然关键词标引的能明显减少存储空间。
Abstract this paper introduces the status of the digital reference book system in the university library and systematically explains the distributing problem of the teaching resource . based on the problem mentioned above , the paper introduces a system , which can cluster and reconstruct the search result through the technology of the keyword index
摘要简要介绍数字图书馆中教学参考书系统的应用现状，并就其中数字教学资源分布零散的问题，提出一种通过关键词索引技术，能够对文本教学资源进行检索，然后将相关联的结果聚类重组之后集中呈现的系统。