Rivers can differ in size and there is no strict rule on how big a flow of water must be to be called as a river.

河流的流域会有不同，对于有多大的流量才能被称为河流没有严格的规定。

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We will then use this rule file in a mining flow to extract the concepts from text columns in relational database tables.

然后，在一个挖掘流中使用这个规则文件，把概念从文本列中提取到关系数据库表中。

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In some cases, it is also possible to graphically determine the sequence of execution of those business rules using a rule flow.

在有些情况下，也可能以图形的形式确定使用规则流的那些业务规则的执行顺序。

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Over the past decade, federal regulations with cost estimates have made up less than half a percent of the total annual rule flow of over 3, 500.

FORBES: Federal Regulation: The Costs of Benefits