The smaller rainbows tend not to have the same colour patterns as a normal rainbow, and the colours are lighter.

这个较小的彩虹往往不具备作为正常彩虹所应具有的颜色模式，色彩也往往要淡一些。

youdao

Rainbow fish are small but breathtaking in colour, varying from a single vivid colour to a spectrum.

彩虹鱼很小但颜色却是令人惊异，从一种单一的鲜艳颜色到光谱上所有的颜色什么样的鱼都有。

youdao

Rainbow fish are small but breathtaking in colour varying from a single vivid colour to a spectrum.

彩虹鱼很小但颜色却是令人惊异，从一种单一的鲜艳颜色到光谱上所有的颜色什么样的鱼都有。

youdao

Once every possible length had been tried, the only way to impress the world was through colour: rainbow-hued Mohawks, stripes and wings.

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The former wife of the president, Winnie Madikizela-Mandela, told mourners that if South Africa was a rainbow nation, the rainbow did not appear to include the colour black.

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So called rainbow proteins (a spin-off from work into bioluminescence), which change colour in response to particular compounds, are also an option for detecting environmental toxins, or the potential agents of terrorism.

BBC: The light fantastic: Harnessing Nature's glow