The many complex factors and the dynamic nature of data means that an optimal plan evaluation is often a complex process indeed for any database system.
这么多复杂的因素，再加上数据本身的动态性，使得最佳计划的评估对于任何数据库系统而言通常都是一个复杂的过程。
With the intensive market competition, the evaluation of alternative process plan has become one of primary mission of technology decision.
随着市场竞争的日益激烈，多工艺方案的评价已成为工艺决策的主要任务之一。
The technology economic evaluation of construction change plan is the important link of construction project change management in the process of construction project change control.
而建设项目工程变更控制过程中，工程变更方案的技术经济评价是建设项目工程变更控制管理的重要环节。
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