At the heart of all that happens here is a single living thing. 这一切最终都依赖于一种生命体的存在
has prepared them for life at the pole, 它们已经学会怎样生存在极地
He must now put his chick at risk. In these temperatures it could freeze in seconds. 它现在要让小企鹅冒险, 在这种温度下 小企鹅随时有可能冻死
After several days at sea, the male bear finally makes landfall, 在海上漂流了几天之后公熊终于登陆了
At the height of summer, the sun never sets, 盛夏的太阳从不落山
At the northern extreme of our planet, 而在地球的北极