系统是属于自动化的搜索引擎，它可以从一个网址列表开始，自动寻找这些网址的下一级网页，可以让中小网站也有有自己特色的搜索引擎-Automated system is part of a search engine, it can start a list of URLs to automatically search for the next one page of these URLs, you can make small sites also have their own special