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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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。

youdao