Like the counting function, when several aggregations with grouping keys are used in a rule, the group and count operations must be cascaded as shown in figure 14.
与计数函数类似，当在一个规则中使用多个具有分组关键字的聚合，对分组与计数操作必须进行级联，如图14所示。
But if you use multiple aggregations with the same grouping keys, or multiple counting functions that count the same column, it will not significantly increase the execution time of the rule.
但是，如果使用具有相同分组关键字的多个聚合，或者对相同列进行计数的计数函数，其不会显著增加规则的执行时间。
Similarly, there is also a rule for counting the expenses made by the firm. Expenses are not counted unless the amount of expense is actually paid by the company.
确认公司的费用也适用同样的原则，发生的费用只有在实际支付时才予以确认。
The conclusive analysis of the data leads out the following rule: the linearity between NOconcentration and photon counting rate exists when the system is in good condition.
通过对数据的分析总结，得出如下规律：系统在一个比较稳定的状态下，NO浓度与光子计数率成线性关系。
This rule measures class coupling by counting the number of unique type references that a type or method contains.
此规则通过计算类型或方法包含的唯一类型引用的个数来衡量类耦合。
This rule measures class coupling by counting the number of unique type references that a type or method contains.
此规则通过计算类型或方法包含的唯一类型引用的个数来衡量类耦合。
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