Although this particular Symantec product doesn't offer web content filtering, it does provide certain fine-grained application and device controls.
尽管赛门铁克的这项产品并未提供网页内容过滤的功能，但它确实提供相当详细的程序和设备控管选项。
Filtering on the input side is less effective because dynamic content can be entered into a Web site database via methods other than HTTP.
对输入端进行过滤的效率比较低，因为通过除了 HTTP 以外的其它方法也可以将动态内容输入到网站数据库中。
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.
大多数搜索引擎的工作方式是：在Web上爬行，索引并过滤在海量数据库中找到的内容，然后搜索这些数据库以找到匹配特定搜索查询的结果。
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.
大多数搜索引擎的工作方式是：在Web上爬行，索引并过滤在海量数据库中找到的内容，然后搜索这些数据库以找到匹配特定搜索查询的结果。
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