从汇总表，他们可以选择打算进一步向下挖掘查看更多细节的维度。

From the summary table, they can then pick the dimensions that they want to drill down into and see more detail.

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实验证明，与现有的自顶向下挖掘算法相比，该算法是快速而有效的。

Comparing with presented top-down mining algorithms, the experiments indicate that it is fast and efficient.

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这就意味着要得到足够热的水来使蒸汽上升，你就不得不把井向下挖掘几千米。

This means that to get water hot enough to raise steam, you have to drill down several kilometres.

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