retrieving tool造句

In the last part , the author analyzes the types and principles of www , a hyper - text information retrieving tool , and sums up the characteristics of some search engines most in use by means of tables . taking google as an example , the author also looks forward to the future of the developing trend of search engines
最后，论文对超文本信息检索工具? ? www的类型、工作原理进行分析，以列表方式对一些常用搜索引擎的特征进行总结，并选取www上新一代搜索引擎google为典型代表，进行实例说明，展望了下一代搜索引擎的未来发展趋势。
It's difficult to find retrieving tool in a sentence. 用retrieving tool造句挺难的