Nearly half of all cubs die in their first year out on the ice. 大约有近一半的幼熊 会在第一年的冰上历险中丧生

65. for a few miles from the coast the ice is already splitting.
    离岸几英里远的海面上 冰层已经开始崩裂
66. Now the mother can start hunting for the seals they must have,
    现在母熊将猎杀海豹 获取紧需的食物
67. but she's leading her cubs into a dangerous new world.
    而它也正带着熊崽们 进入一个危险的新世界
68. Nearly half of all cubs die in their first year out on the ice.
    大约有近一半的幼熊 会在第一年的冰上历险中丧生
69. Summer brings 24 hours of sunlight
    夏季意味着全天24小时的日照
70. and the thawing shifting landscape.
    融化的冰雪不断改变着地貌
71. Further south the winter snows have almost cleared from the Arctic tundra.
    在更远的北极苔原上 冬雪几乎已经完全消失

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 68 行