Note: Although a few Web browsers provide a quick start for RSS subscriptions, you'll find value in other tools, most importantly the ability to sort and filter content.

注：虽然少数Web浏览器提供用于RSS订阅的快速启动，但是您会发现其他工具更有价值，最重要的是分类和过滤内容的能力。

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When filters were originally introduced in the Servlet 2.3 spec, they could only filter content between the Web client and the specified Web resource the client was accessing.

当过滤器在Servlet 2.3规范中首次引入时，它们只能过滤Web客户机和客户机所访问的指定Web资源之间的内容。

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Filters block out Web sites with offensive content, usually based on keywords or lists complied by the filter developer.

过滤器常常基于些重点词或者过滤器开发者制定的一些条框而过滤掉有攻击性内容的网站。

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