There are mainly three kinds of coordination between social subsystems: the structure coordination, the function coordination and the coordination of operation way.
社会子系统之间的协调主要有三种形式：结构协调、功能协调和运作方式协调。
A friendly user interface system can show the function of system in visual and transparent way, and simplify user operation.
一个友好的用户界面系统可以直观、透明地展示系统所具有的功能，并且简化用户操作。
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