we make up for with intelligence and large families. 但我们能用 智慧和庞大的家族进行弥补
stable sanctuaries for life for over 50 million years, 为生命提供稳定的庇护所 超过5000万年
Instead, they bide their time, waiting for the right moment. 相反 它们耐心等待时机
for they can look forward to the end of winter 因为可以期待冬天的结束
Age-old enemies that have been locked in battle for millennia. 数千年来 这对宿敌一直缠斗不休
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
Only those built for the cold can survive. 只有为寒冷而生的生物才能存活
it has been too warm for ice to form. 温度都太高 无法形成冰冻