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。
A friendly user interface system can show the function of system in visual and transparent way, and simplify user operation.
嵌入式GUI就是在嵌入式系统中为特定的软硬件设备或环境而设计的图形用户界面系统。
Embedded GUI is a graphic user interface system designed for specific software and hardware equipment or environment in the embedded system.
站在交互设计的角度，本文研究了笔式用户界面系统可用性设计的过程及其中运用的原理和方法等。
Standing on the point of interaction design, the paper studies the usability design of the PUI system and its theories and methods etc.
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