Her tail has caught her... 尾巴救了她一命

53. A fall from here would mean certain death.
    从这里跌落必死无疑
54. It's the first time she's been as high as this on her own.
    这是她第一次独自爬到如此高的地方
55. As she climbs still higher, the branches get thinner and thinner.
    她越爬越高 树枝越来越细
56. Her tail has caught her...
    尾巴救了她一命
57. ...but now she's stuck in mid-air,
    可她现在被困在空中
58. unable to reach any other branch.
    够不到其它的树枝
59. Father, however, was watching.
    而父亲其实一直关注着

来自《行星地球 第二季 第三集 Planet Earth S02E03 丛林》第 56 行