但与字串运算式中，有没有强类型和查询运算式不能得到解决，直到运行时，这意味著您不会在此之前发现问题。

But with a string expression, there's no strong typing and that query expression doesn't get resolved until run time, which means that you won't discover problems until then.

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在指定的输入子字串内，使用指定的取代字串来取代符合规则运算式模式的指定最大字串数目。

Within a specified input substring, replaces a specified maximum number of strings that match a regular expression pattern with a specified replacement string.

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最简单的规则运算式形式，就是与搜寻字串比较的单一、一般字元。

The simplest form of a regular expression is a single, ordinary character that is compared with a searched string.

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