描述了搜索引擎的系统结构，从网络机器人、索引引擎、Web服务器三个方面进行详细的说明，并通过实现一个新闻搜索引擎来进行例证。-Describes the search engine' s system structure, from the network robot, indexing engine, Web server three areas detailed explanation, and through the realization of a news search engi