The index can increase the efficiency of retrieval and reduce the redundancy.

所提出的索引机制可大大提高数据的检索效率，减少了冗余信息。

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The efficiency of retrieval is an important indicator of judging the quality of search engine.

搜索引擎的检索效率是评价搜索引擎质量的一个重要指标。

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The result showed that the strategy can improve the stability of the system and efficiency of retrieval.

结果表明，该策略可以提高系统的稳定性和检索效率。

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In developing early data processing systems, the high cost of memory and storage led to a premium being placed on the efficiency of application data access and retrieval.

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