A mother grizzly emerges from her den 灰熊妈妈正走出巢穴

99. This huge mountain chain continues the great spine that runs from Patagonia to Alaska.
    巨大的山系脊梁从巴塔哥尼亚 一直延伸到阿拉斯加
100. The slopes of the Rockies, bleak though they are,
     尽管落基山地荒凉凄冷
101. provide a winter refuge for some animals.
     却能为一些动物提供越冬场所
102. A mother grizzly emerges from her den
     灰熊妈妈正走出巢穴
103. after six months' dozing underground.
     长达6个月的地下冬眠结束了
104. Her two cubs follow her
     两只小熊紧跟着它们的母亲
105. and take their first steps in the outside world.
     第一次踏足这个陌生的户外世界

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 102 行