工具是为用户交互界面提供服务的视图对象。
A widget is a View object that serves as an interface for interaction with the user.
将数据服务响应的结果绑定到用户交互界面中。
To bind data service results to properties of user interface controls.
大多数的字体要么是从字体打印的角度设计，要么是为了用户交互界面而创造。
Most fonts in use at the time were either adapted from type designed for print, or were created primarily for user interface elements.
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