Choosing appropriate partitioning keys is essential for optimizing database performance in a partitioned environment based on DB2 software.

选择适当的分区键对于优化基于DB 2软件的分区环境中的数据库性能非常关键。

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The study on the reactivity of limestone is significant both on limestone choosing in the design of WFGD and on optimizing the operation parameters.

对石灰石活性的研究不仅有利于设计阶段选择合适的石灰石，而且对于优化系统操作参数也具有重要意义。

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By choosing rationally the composing materials and optimizing concrete mixing ratio, high-performance concrete adopting C32.5R is successfully applied in sea port engineering.

通过科学地选择组成材料及优化混凝土配合比，采用强度等级32.5 r型水泥配制高性能混凝土，并且成功应用于海港工程中。

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