说明：  一个好的用户界面(GUI)的设计通常可以在现实世界找到相应的表现。例如，如果在您的面前摆放着一个类似于电脑键盘按键的一个简单的按钮，然而就是这么简单的一个按钮，我们就可以看出一个GUI设计的规则，它由两个主要的部分构成，一部分使得它具有了按钮应该具有的动作特性，例如可以被按下。另外一部分则负责它的表现，例如这个按钮是代表了A还是B。
(a good user interface (GUI) design can usually be found in the real world corresponding performance. For example, if you are placed in front of a computer keyboard keys similar to the one simple button, But is such a simple one button, we can see a GUI design rules It consists of two major components, has made it part of the button should have the characteristics of movement, For example, can be pressed. Another part will be responsible for its performance, for example, the buttons are the representatives of A or B.)