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。
According to the dynamic information of manufacture resource, the process plan system should make process plan decision accurately and timely fore-manufacture.
制造工艺系统要求及时准确地根据资源动态信息进行工艺路线的实时决策。
Effective teaching is not the mechanical implementation of the designed teaching plan, but an effective generation in the dynamic teaching process.
有效教学不是机械地执行预设的教学方案，而是教学过程中的动态有效生成。
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