One of the essential activities of dimension modeling is to capture the aggregation paths or aggregation hierarchies along which end users perform roll-up and drill-down.

维度建模最重要的活动之一就是捕获聚集路径或终端用户执行上卷和下钻所依照的聚集层次结构。

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In developing or implementing a system of cost accounts, an appropriate numbering or coding system is essential to facilitate communication of information and proper aggregation of cost information.

在开发和运用成本报告系统时，适当的编码或译码体系有利于信息沟通和成本信息的汇总。

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So the people who had familial aggregation with essential hypertension are chief objects in prevention …

有家族多发现象同时患有高血压的人群是防制脑血管病的重点对象。

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