Setting up a regional material system needs to take account not only of its macro economic effect, but also of its micro economic interests.

区域物流系统的建立既要考虑其宏观经济效益，也要考虑其本身的微观经济效益。

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Urban land use is a huge and complex system, it is include the macro issues and micro issues, both economic efficiency, but also social and environmental benefits issues.

城市土地利用是一项巨大而复杂的系统，这里面既有宏观问题，也有微观问题，既有经济效益问题，也有社会效益和环境效益问题。

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The basic working principle, hardware structure and main technical features of a micro computer based control system for transformer economic operation is presented in this paper.

介绍了一种微机双绕组变压器负荷经济运行控制系统的基本工作原理、硬件结构框图和主要技术特点。

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