- A bison's thick coat is such good insulation,
野牛厚厚的皮毛是出色的隔热材料 - they need little energy to keep warm...
所以它们不需要多少能量 就能保持温暖 - which is just as well,
这也非常重要 - as grass is hard to find beneath the snow.
因为冰雪之下很难找到草 - But bison aren't the only hungry ones here.
但野牛并不是这里唯一饥饿的动物 - Wolves can also withstand the coldest of winters...
狼也能忍♥受最寒冷的冬季 - and have been hunting bison in America for more than 100,000 years.
其在美洲捕杀野牛的历史 已经超过10万年
as grass is hard to find beneath the snow. 因为冰雪之下很难找到草
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