Users should be able to drill down from one summary table into another summary table, ultimately arriving at the fact table (if that's the level of detail they need).

用户应该能够从一个汇总表向下深入到另一个汇总表，最终达到事实表(如果事实表是他们需要的细节级别)。

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There will be a fire drill at Rose Garden School.

玫瑰学园将举办一场消防演习。

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At noon ET Friday, a drill was launched by natural disaster experts at San Diego State University to test how social media would be used to respond to a crisis.

在美国东部时间周五中午，由圣迭戈州立大学的自然灾害研究专家们发起的一项演习正在进行中，该演习希望了解社会媒体在危急关头将有怎样的反应。

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Later tests found oxygen levels at about 7 percent -- too little to survive -- but that may be because the drill hole drifted as it was being bored, Stickler said.

CNN: Camera lowered into mine cavity shows 'survivable space'