When your chapter is a rainbow of markings, you don't have to read all of it again before an exam.

当你的书本里布满彩虹般的标记时，你不必在考试前把所有的内容都读一遍。

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You all know how when you take a crystal prism and pass a beam of sunlight through it, you get a spectrum, which looks like a continuous band of rainbow colors.

你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。

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There was a time when Apple had products that were in all the colors of the rainbow (you could even get an iMac in purple or orange).

有段时间苹果的产品可以有彩虹中的所有颜色（你甚至可以拥有一台紫色或橙色的iMac）。

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They came in all different shades: black, white, mixed race, you name it, it was a rainbow nation of the destitute.

CNN: Katrina: When New Orleans went from?developed world to Third World