在上图中放大了的部分，你可以看到，大多数时候这种对比只是一条1像素的高亮线挨着1像素的暗线。
In the enlarged portion of the above screenshot, you can see that most of the time this contrast is just a lightly colored 1-pixel line next to a dark 1-pixel line.
这与基于位图的图像形成鲜明的对比，因为位图图像在不断放大时会出现明显的失真。
This is in distinct contrast to bitmap-based images, which can degrade significantly as you scale up a given image's size.
第三方产品提供附加的功能，如放大全系统字体的“主题”，或者提供背景和前景之间高对比度的主题。
Third-party products can provide additional functionality, such as a "theme" that enlarges fonts system-wide or one that provides high contrast between background and foreground.
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