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。
The levels of a taxonomy can be used to drill-down or roll-up in a report.
分类的层次可用于在报告中向下钻取或向上滚动。
Rain down the grass stems roll down, a drop of drill into the earth, and a drop into the grass mouth, can not find.
雨珠顺着小草的茎滚下来，一滴钻到土里，又一滴钻到了小草的嘴里，找不到了。
Working on this drill will help you become more confident through your thinking process and to help one get out of their own way and roll the ball better than ever.
做这样的练习可以让你在思考的过程中更自信，也可以帮助你摆脱束缚让球比以前滚动得更好。
Secondly there is error between the thread roll angles of thread rolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。
By designing and making the roll-over drill jig, the processing precision of hole is improved and work intensity is reduced.
通过设计制造翻转式钻模，提高孔的加工精度，降低劳动强度。
Based on the functions of Roll Up, Drill Down, Slice and Dice, this paper designs and implements the Backward function on the cache of data storage and access, making the system more efficient.
在系统已有的上卷、下挖、切片、切块等功能基础上，提出基于缓存的数据存储和访问机制，设计并实现了回退功能，提高了OLAP查询效率。
Based on the functions of Roll Up, Drill Down, Slice and Dice, this paper designs and implements the Backward function on the cache of data storage and access, making the system more efficient.
在系统已有的上卷、下挖、切片、切块等功能基础上，提出基于缓存的数据存储和访问机制，设计并实现了回退功能，提高了OLAP查询效率。
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