外形平滑时而带有梯度，上下，左右面的边缘有一定弧形。

Smooth shape with a gradient from time to time, from top to bottom, left and right side edges have a certain arc.

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这是一种左右为分别两页的框架结构，一般左面是导航链接，有时最上面会有一个小的标题或标致，右面是正文。

This is a framework for two different pages, usually on the left is the top navigation links, sometimes there will be a small title or text is beautiful, right.

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