听力文本

Early summer, and great grey owl chicks are fledging.
早夏，乌林鸮的孩子刚刚长大。
Adults can only raise young here,
成鸟能在这里养育小宝宝，
in years when the seasonal vole crop is big enough to support them.
表示今年的田鼠够多可以养活它们。
The moment has arrived for their first flight.
小乌林鸮的第一次飞行时间到了。
Leaping from the world's tallest trees is not for the faint hearted.
要从世界上最高的树木上跳下，可不能恐高。

If you're going to fall here it's quite a good idea to do it in stages.
想要从这里落下，分阶段进行不失为一种好方法。
The ground is no place for an owl.
地面对乌林鸮来说只是个落脚点。
If he's to climb to the top of his class he'll need to persevere.
想要在班上名列前茅，必须有毅力。
So now, let's have another go.
现在，可以再来一次了。

视频及简介

在北极边缘有着大片针叶树林，那是矮小的针叶科树木寂静的世界。那些树或许真的很矮，但在高空拍摄下，树林显示出其真实的大小。世界有1/3的树木都生长在这里，在短暂的夏季里，这些树木制造了大量的氧气足以改变的大气的成份。