User interface (or interface) is: Human and machine (or program) the interaction...

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用户界面（或接口）是指：人与机器（或程序）之间交互作用的工具和方法。如键盘、鼠标、跟踪球、话筒都可成为与计算机交换信息的接口。-User interface (or interface) is: Human and machine (or program) the interaction between the tools and methods. Such as keyboard, mouse, track ball, microphone and computer can become the interface to exchange information.