It can take fifty years for a tree to get bigger than a seedling. 一棵树从秧苗到成年需要50年的时间

14. The Taiga circles the globe and contains a third of all the trees on Earth.
    针叶林环球分布 占全球所有树木总量的三分之一
15. It produces so much oxygen, that it refreshes the atmosphere of the entire planet.
    它制造了大量的氧气 是我们这个地球的空气清新剂
16. At the Taiga's northern extent the growing season can last for just one month a year.
    在针叶林的北部区域 树木的一年内的生长时节只有1个月
17. It can take fifty years for a tree to get bigger than a seedling.
    一棵树从秧苗到成年需要50年的时间
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

来自《行星地球 第一季 第十集 Planet Earth S01E10 季节森林》第 17 行