原因：指定的过滤器或过滤准则是错误的构造坏。
Cause: The filter specified is wrong or CPS constructed a bad filter.
不管是什么人，这种过滤功能都以同样的准则运行。
This filter operates according to the same rules no matter who the person is.
规则大量存在于面向对象系统中，反映了诸如业务流程控制、数据处理准则、信息过滤策略等特点。
There are many rules in object-oriented systems, which describe the characters of business flow control, data-processing criterion, information filtering strategy and so on.
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