TIRED评价：一些用户抱怨阅读器的阅读文本对比度太低。
TIRED: Some users have complained about the low-contrast text.
它们看上去真棒，尤其是在更大尺寸时，然而，假如有足够的对比度，它们有时也能成功地运用于正文文本。
They look great, especially at larger sizes, although they can sometimes also be successfully used for body text, provided there's enough contrast.
背景灰度相比其他阅读器浅了几个层次，让黑色文本在背景上有着更高的对比度。
The background gray is a few shades lighter than on any other reader, producing much better contrast behind the black text.
例如，有些弱视用户常常要求look -and -feel在文本与背景之间具有高对比度，同时还要有大的字体和图标。
Visually impaired users, for example, often need a look and feel with a high contrast between text and background, as well as large fonts and ICONS.
通过与之相同的方法，您可以创建一个带有白文本、黑背景、普通大小字体的高对比度的lookandfeel，您只需提供如清单4所示的另一个资源文件。
In the same way, you can create a high-contrast look and feel with white text on black background and normal font size just by providing another resource file as shown in Listing 4.
文本颜色将根据计算的对比度自动切换（黑色和白色之间）。
The text color will automatically switch (between black and white) according to the calculated contrast ratio.
大号文本： 可放大的文本和图片式的可放大文本的对比度比至少为3：1；
Large Text: Large-scale text and images of large-scale text have a contrast ratio of at least 3:1;
大号文本： 可放大的文本和图片式的可放大文本的对比度比至少为3：1；
Large Text: Large-scale text and images of large-scale text have a contrast ratio of at least 3:1;
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