There are less expensive and more efficient water filtering systems.

有更便宜和更有效的水过滤系统。

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DataSift is going to make RSS very much less relevant as we're able to build new filtering systems.

当我们能建立一个新的滤除系统时，DataSift将使RSS有更少的联系。

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The paper also describes some important concepts and technology in information filtering systems.

描述了信息过滤系统的重要概念和用于实现的技术；

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Unlike some filtering systems, it works on a page by page basis rather than an entire domain.

FORBES: Connect

The speed with which websites can spring up and move can also catch out some filtering systems, said Mr Haggart.

BBC: The problems of finding filth

But, said Mr Haggart, many filtering systems are too crude and let through sites they should block and stop those that are innocent.

BBC: The problems of finding filth