说明：  从网站某一个页面(通常是首页)开始，读取网页的内容，找到在网页中的其bai它链接地址，然后通过这些链接地址寻找下一个网页，这样一直循环下去，直到把这个网站所有的网页都抓取完为止。
(Starting from a certain page of the website (usually the front page), read the content of the page, find its Bai link address in the web page, and then find the next page through these link addresses. This cycle continues until all the pages of this website are captured.)