short-scale contrast的用法和样例：
例句
- Make sure that the contrast is high between the background and the foreground.
确保背景与前景之间具有高对比度。 - Screens that must be visible under bright lights or from a distance require high contrast and more saturated colors.
在强光下或者远距离也要能够看清楚的屏幕，需要高对比度和更为饱和的色彩，上年纪的人和视力不好的人需要较大且易读的显示。
