文本过滤指的是这样一个过程：获得文本的输入流，并在将文本发送给输出流之前对文本执行一些转换。

Text filtering is the process of taking an input stream of text and performing some conversion on the text before sending it to an output stream.

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通过文本实用过滤器发送文本文件和输出流，以修改输出。

Sending text files and output streams through text utility filters to modify the output.

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Stripper是SAX过滤器的一个良好示例，这是以SAX事件流作为输入，并生成另一个SAX事件流作为输出的一段代码。

The Stripper is a good example of a SAX filter, a piece of code that takes a stream of SAX events as input and produces another stream of SAX events as output.

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