They are guided by an old female, the matriarch, 它们由一头年长的雌性即女族长带领

61. and evolved into these highly specialized beasts.
    进化成了这些高度专门化的巨兽
62. Long hair, smaller ears, and shorter tails
    长毛 小耳 短尾
63. help them conserve heat in the cold.
    有助于在寒冷的环境中保温
64. They are guided by an old female, the matriarch,
    它们由一头年长的雌性即女族长带领
65. who passes her knowledge down the generations.
    由其将知识代代相传
66. Generations she needs to keep safe.
    以确保后代的安全
67. Bigger than lions today,
    穴狮比今天是狮子更大

来自《我们星球上的生命 第一季 第八集 Life on Our Planet S01E08 冰与火的世纪》第 64 行