对于百度搜索引擎来说，蜘蛛黑洞特指网站通过极低的成本制造出大量参数过多，及内容雷同但具体参数不同的动态URL ，就像一个无限循环的“黑洞”将spider困住，Baiduspider浪费了大量资源抓取的却是无效网页。 比如很多网站都有筛选功能，通过筛选功能产生的网页经常会被搜索引擎大量抓取，而这其中很大一部分检索价值不高，如“500-1000之
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