so that it's tongue can extract the seeds. 然后用舌头来卷取种子
But one animal is so expert at survival in this frozen forest 不过有一种动物是在这个冰雪森林中生存的专家
Growth is so difficult that conifers protect their precious leaves by filling them with resin. 因为生长困难 针叶树木用树脂来保护宝贵的叶子
With so few prey animals here, life for a hunter is particularly hard. 猎物是如此至少,捕猎对于它们来说是极端困难
Some animals are so difficult to glimpse 有些动物如幽灵般
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
cruising back and forth between the shallow seas where life proliferates so abundantly on our planet. 让我们在浅海之间来回巡游 赞叹于地球生命的丰富多彩.
Fish and krill stocks are declining so rapidly that spectacles like this may soon be part of history. 鱼和磷虾的产量正在迅速减少 象这样的景象可能很快将成为历史
but in Southern Africa they're so big they create seas rich enough to support colonies of over a million seals. 不过在南部非洲的大洋流带来的 充足食物能满足百万只海豹的需要
and seemingly delight in doing so. 看起来他们也喜欢这样做