So far, retrieval system is mainly based on the keyword search and classification technology.

目前已有的检索系统主要采用基于关键字的全文检索以及分类检索技术。

youdao

So far, retrieval system is mainly based on the keyword search and classification technology.

目前已有的检索系统主要采用基于关键字的全文检索以及分类检索技术。

youdao