听力文本

Spring in a deciduous woodland is special.
春天的落叶林是很特别的。
With no leaves overhead, the rays of the sun strike the forest floor directly,
由于没有树叶遮蔽，阳光可以直射到森林地表上，
and their warmth rouses plants from their winter sleep.
这种温暖让植物们从冬眠中苏醒过来。
The ground living plants are in a hurry.
地表植物正在匆忙生长。
Before long the trees above will come into leaf and steal their light.
不久之后，树木长出的新叶将会重新把阳光夺去。
Their flowers decorate the forest floor,
花，是森林地表的天然装饰，
as they advertise their sweet nectar to the newly emerged insects.
它们以花蜜为广告，来吸引新生的昆虫。

The spring blooms of the deciduous woodlands have no equivalent in either the great conifer forests, or the tropical jungles.
春，使落叶林与针叶林和雨林没有任何相似性。
Within a matter of weeks the canopy has closed
再过几个星期，树冠层重新遮蔽天空，
and only a few wheeling shafts of light penetrate the woodland.
透到地面的只有丝丝缕缕的阳光。
In the treetops, the broad leaves rapidly expand to their full size to make the most of summer while it lasts.
在树梢，树叶很快生长开来并保持这个状态一直到夏末。

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。