Collectively, the faces of all the tiny airborne ice crystals act as a giant concave mirror.

总的来说，所有微小的空中冰晶的面孔扮作一块巨大的凹镜。

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Collectively, the faces of all the tiny airborne ice crystals act as a giant concave mirror.

总的来说，所有微小的空中冰晶的面孔扮作一块巨大的凹镜。

youdao