So far, we have represented three dimensions of information explicitly.

到目前为止，我们已经显式地表示了信息的三维。

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For example, an analytical application might require sales information contained in a large fact table to be retrieved by product, by region, and by date (three dimensions).

例如，分析应用程序可能需要按产品、地区和日期(三个维)获取一个大型事实表中的销售信息。

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Unlike DVDs, which store data in thin layers just beneath the surface of the disc, holographic storage encodes information in three dimensions, within the volume of the disc.

不像dvd盘那样把数据存储到磁盘表面下的薄层中，全息存储技术在磁盘容量内以三纬形式对信息进行编码。

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