A frequent requirement for data warehouses and business intelligence environments involves maintaining a rolling history of select data over a given period of time.

数据仓库和业务智能化环境的一项常见需求是，维护特定时间段内滚动变化的历史数据。

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Once, rolling off her and almost falling off the bed, he noticed a smear of period blood that K. had been unable to wash out.

有次结束后他几乎从床上摔下去，他注意到床上的K没洗掉的一点血迹。

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The creation of Business Plans is a rolling process with each Business Plan replacing the Business Plan that was approved for the preceding period.

经营计划的创建是一个滚动式过程，每个经营计划代替前一时期获批准的经营计划。

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During this period, Keith Richards of the Rolling Stones sent James a letter inviting her to tour with the band if she stayed clean.

NPR: "Matriarch of the Blues" Etta James dies at 71

Wayne Angell, who was a governor of the Federal Reserve from 1986 to 1994, devised a system that involved tracking the changes in the prices of 21 commodities over a rolling 52-week period.

FORBES: Hey, Ben Bernanke, How About A Return To Normalcy?

Awhile back we launched a real-time, new posts page ( you can see it here) with a chart that shows the total number of new posts, comments and shares over a rolling 24-hour period.

FORBES: Inside Forbes: What's the State of Our Social Union? Here Are Some Stats.