Web-filtering services are one of the best ways to fight bots.
网页过滤服务是打击僵尸网络最有效的方法之一。
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Most search engines work by crawling the Web, indexing and filtering the content they find into massive databases, and searching these databases to find results matching a particular search query.
As of Wednesday, [gm99nd] 's Chinese Web site was still filtering search results, with a message at the bottom of its Web pages notifying users of the practice.