为了达到这个目的，一个新的文字渲染库被设计出来；

To achieve this, anew text-rendering library has been designed;

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添加一行按钮，并且文字一直渲染在用户视野。

Add a line to the button and have the text always render in the users view.

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在屏幕上渲染文本需要一些资源来描述字符的形状，即字体，还需要一些按照每种文字的规定渲染字符图像的程序。

Rendering text on the screen requires some resource to describe the shapes of the characters, i. e. , the fonts, and some process to render the character images as per script conventions.

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