如果一个模式被发现，出于过滤得目的，maildrop的过滤将模式匹配的结果作为数字1，或者真。
If a pattern is found, maildrop's filter interprets the results of the pattern match as number 1, or true, for filtering purposes.
针对异常发现技术和模式匹配技术各有利弊的特点，设计了将这两种技术综合运用的网络入侵检测系统。
On the base of the characteristic of modes of anomaly-based and signature-based, a network invasion detection system is proposed to use the virtue of two modes to detect network invasion.
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