their young were born. 产下幼崽

93. grizzly bears make their winter dens
    灰熊将巢筑在背风坡厚厚的积雪之下
94. 10,000 feet up in the deep snow of leeward slopes.
    海拔高达三千米
95. And while they were half-asleep in the depths of winter,
    他们在隆冬半梦半醒之际
96. their young were born.
    产下幼崽
97. Now these cubs are taking their first steps
    现在这些熊宝宝正迈出他们
98. into the outside world.
    走向外界的第一步
99. This mother is leading her three youngsters
    熊妈妈带着三只幼崽

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 96 行