The northern forest may be the largest on Earth 地球北部的森林可能地球上最大的森林了
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
are the most extensive forests on Earth. 在地球上分布最为广泛
Some are the largest organisms on Earth 有些树是地球上最大的物种, 其他生命在它面前显得相当渺小
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.
The polar seas in summer are the most productive on the planet 夏季的极地海域是地球上最多产的
the greatest concentration to be found anywhere on Earth. 到处都是世界上最伟大的聚集
Both animals are clumsy on this terrain but the penguin has the more to lose. 两种动物在这地形下都显得笨拙 不过企鹅更容易失败
King chicks are dependent on their mothers for over a year and this puts a great deal of pressure on the parents. 小帝企鹅必须依靠它们的母亲至少一年 这给它们父母带来巨大的压力