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阿拉斯加或西伯利亚的爱斯基摩狗,长有厚厚的毛皮,其绝热作用是如此之好,即使在寒冷的冬夜,雪花落到它们身上也不会融化,反而起到挡风的作用。这时它们睡
The Alaskan or Siberian Malamute, thick with fur, is so adiabatic that snow will not melt on them even on a cold winter's night, but instead act as a windshield. At this time they sleep