from hundreds of miles away. 几百公里外的青草长势

29. Saiga always give birth to twins,
    高鼻羚羊总会产下孪生幼崽
30. so their numbers grow rapidly just when grass is plentiful.
    这样能够在草源充足时迅速繁衍
31. Their bizarrely shaped nose can detect fresh growth
    它们的鼻子长相奇怪 却能够勘测到
32. from hundreds of miles away.
    几百公里外的青草长势
33. The young twins will now begin the nomadic life
    这两只小羊即将与其他草原动物一样
34. they share with most animals on the world's open plains.
    开始辽阔草原上不断迁徙的生活
35. Grasslands occur where rain is too sporadic for forests to exist.
    降雨量不足以养育森林时就会出现草原

来自《行星地球 第二季 第五集 Planet Earth S02E05 草原》第 32 行