Indexing all that data is obviously expensive for reads, but also for writes.
显然，对所有数据编索引不仅对于读而且对于写都很耗时。
Note that you can back indexing by many different sources, for example, a RAM disk.
请注意，可以根据很多不同的源(例如，RAM磁盘)进行反向索引。
Also assume that indexing a terabyte can be done now for a reasonable cost.
又假设索引容量可以做到现在，以合理的费用。
For the other way around there is some work to be done during indexing.
对于其他的方式，在有一些工作要做在索引。
Shot is often used as a basic unit for both analyzing and indexing video.
镜头通常作为分析和检索视频的基本单元。
Shot is often used as a basic unit for both analyzing and indexing video.
镜头通常作为分析和检索视频的基本单元。
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