Others have also said it could have been cloud iridescence, which happens when water droplets or crystals scatter light.
其他的说法是，这可能是云彩虹色，发生在水滴或水晶散射光芒的时候。
Iridescence is proof that not every cloud has a silver lining - "some have tutti-frutti-colored ones."
虹彩的存在证明了不是所有的云朵都有银色的衬边——“有些云彩的衬边是五颜六色的。”
Iridescence can happen to any type of cloud, but is most common in stratospheric clouds in polar regions.
彩虹色色泽可以出现在任何一种云，但还是最常出现在极地的平流层云。
Iridescence can happen to any type of cloud, but is most common in stratospheric clouds in polar regions.
彩虹色色泽可以出现在任何一种云，但还是最常出现在极地的平流层云。
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