To justify the cost of model creation and maintenance, you need to ensure that your model is highly useful.
为了让模型创建和维护方面的成本物有所值，需要确保模型非常有用。
The significance of this model is to decrease the number of databases in cooperative database system and reduce the cost of maintenance.
建立该模型的意义在于减少协同数据库系统中数据库的数量和降低维护的成本。
The decision support model for bridge component maintenance is developed on the basis of comparison of the annual average maintenance cost of bridge component among all selected maintenance schemes.
桥梁构件维护决策支持模型是基于计算桥梁构件在各可选维护方案下其状态周期内的年均维护成本的基础上建立的。
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