Example 1 - Historical Rates with only two roll ups.
示例1—只有两个汇总(roll ups)的历史汇率。
This is a big reason why data warehouses typically don't work against the live data, but export daily roll-ups instead.
这是一个很大的原因数据仓库对实时数据通常不工作，而是每天出口卷帘窗。
If you are creating a movie that explains something, it is very common to use B-roll to provide close-ups of the thing you are explaining.
如果生成的电影要解释某个东西，则经常用B卷对要解释的东西提供特写。
As a result, hospitals will begin unwinding the money-losing practices they have been acquiring over the last five years, similar to the 1990s when the physician practice management roll-ups failed.
结果将导致医院开始剥离过去五年内收购的亏损诊所，这跟上世纪90年代，医师诊所管理公司纷纷破产时的情形非常类似。
As a result, hospitals will begin unwinding the money-losing practices they have been acquiring over the last five years, similar to the 1990s when the physician practice management roll-ups failed.
结果将导致医院开始剥离过去五年内收购的亏损诊所，这跟上世纪90年代，医师诊所管理公司纷纷破产时的情形非常类似。
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