She needs to get her youngster to ground level. 她得把孩子们从屋顶带下来

191. Now, her young have outgrown their nursery.
     现在 这些宝宝们住不下了
192. This is her first major challenge as a mother.
     这是当妈妈的第一个大挑战
193. The time has come to move to a new home.
     搬新家
194. She needs to get her youngster to ground level.
     她得把孩子们从屋顶带下来
195. But instead of an easy climb down a tree,
     可脚下不是方便攀爬的树干
196. she is faced with a vertical drop,
     而是垂直陡峭的墙壁
197. with little to cling onto.
     几乎没有着力点

来自《行星地球 第二季 第六集 Planet Earth S02E06 城市》第 194 行