In contrast, the colorful auroras that light up the skies at high latitudes are powered by particles with less than one thousandth as much energy.
相比之下，那些处于高纬度并照亮天空的艳丽极光所提供给粒子的能量不到前者的千分之一。
When placing your light probes, you want to do it in areas with a high contrast in light.
在放置灯光探测器时，你可以把它放置在和光亮有较大对比的一个区域内。
With age, considerably more light is required for high-contrast vision Magnification should always be tested with light (if possible).
随着年龄的变化，人们在需要提高对比度时就需要试探性地增加放大倍数和光强。
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