panel 类将把元素的边界设为设备框的大小，添加 10 个像素的填充，并且设置页面的背景颜色和条纹。

The panel class sets the element's border to the size of the device box, adds 10 pixels of padding, and puts the background color and pinstripes on the page.

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他们形成了无数的电影和电子游戏的背景，使艺术家们有机会探索自己的想象力的边界。

They form the backdrop of countless films and videogames and give artists an opportunity to explore the boundaries of their imagination.

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背景：左心室边界的准确分割是对左心室运动及形变进行分析的前提。

BACKGROUND: Analysis of the left ventricle motion and deformation is based on accurate segmentation of the left ventricle boundaries.

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