By flipping individual thin-film transistors on and off in a matrix of millions of transparent switching cells etched on to the surface of the display, images can be made to dance on the LCD screen.

在液晶显示器的表面是数百万个透明的电池开关组成的矩阵，在这个矩阵中扳动各个薄膜晶体管的开关，图像就能在显示屏上跳动了。

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Ok, if we look at it near here, if we walk along this way, the surface is to our right.so, we should actually be flipping things upside down. The normal vector should be going down.

我们看看这里，如果我们沿着这条路走，曲面就在我们的右边，我们应该是把它颠倒一下，这个法向量也应该向下。

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EGL is used to perform surface creation and flipping (instead of rendering).

EGL是用来执行表面创建和翻转(而不是渲染)。

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