The prints of an Arctic fox and the hare it might've been stalking. 北极狐追捕野兔的脚印

18. It's a silent world where little stirs
    除了偶有动静,这里万籁俱寂
19. But there are occasional signs of life.
    即使在满是冰雪的童话世界中
20. Stories written in the snow.
    也有非常特别的生命
21. The prints of an Arctic fox and the hare it might've been stalking.
    北极狐追捕野兔的脚印
22. A female polar bear
    这是雌性北极熊
23. and her two cubs.
    和她的2个孩子的脚印
24. Some animals are so difficult to glimpse
    有些动物如幽灵般

来自《行星地球 第一季 第十集 Planet Earth S01E10 季节森林》第 21 行