It then iterates through the rewrite rules one at a time, and for each rule, it grabs its LookFor property and USES a regular expression to determine if a match is found in the requested URL.

然后，它将遍历重写规则，每次遍历一个，对于每个规则，它将获取规则的LookFor属性，并使用正则表达式来确定是否在被请求的URL中找到了匹配的规则。

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