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贝加尔湖冰封期,温度的剧降使湖水结冰,不断膨胀、挤压而断裂,裂冰因折射蓝光而形成蓝冰。
Baikal ice period, the dramatic temperature drop so that the lake frozen, expanding, squeezed and broken, cracked ice blue light due to refraction of blue ice.