Use for storing hyperlinks, which provide single-click access to Web pages through a URL (Uniform Resource Locator) or to files through a name in UNC (universal naming convention) format.
用于存储超链接，这些链接提供通过URL(统一资源定位器)对网页的单击访问或通过UNC(通用命名约定)格式的名称对文件的单击访问。
Then the hyperlinks are filtered by the method of URL comparison and the ones which satisfy matching condition are left.
即对爬虫程序在网站内获取的超链接采用URL比较法进行先过滤，去掉不满足匹配条件的网页。
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