纪录片《冰冻星球》 第35期 极地之秋（1）

Brunnich's guillemots have spent the summer months

夏季的几个月里 海鸠

packed together on vertical¹ cliffs

聚集在陡峭的悬崖之上

beyond the reach of predators².

远离捕食者的魔爪

They are among the most

它们是北半球

numerous seabirds in the Northern hemisphere.

数量最多的海鸟之一

This colony alone contains 100,000 birds

单是这个鸟群 就有十万只

and there are many more like it all along the Arctic coastline.

而沿北极海岸 类似的鸟群更是不计其数

In just a few weeks these cliffs will empty.

再过几周 这几片悬崖将空空如也

But before the guillemots can leave,

但在幼雏羽翼丰满之前

their chicks must fledge.

海鸠还不能动身

Their feathers are now fully³ formed,

它们的羽毛已经长成

but their stubby wings are still too short for them

但翅膀还过于粗短

to fly properly -

无法自在飞翔

this will be a challenge.

这是个挑战

It's a 150 metre drop and

这一跳就是一百五十米

they need to make it all the way to the sea.

还得一路跳到海里

Here goes.

起跳

He falls short and survives the crash landing.

他没跳到终点 不过也活着着陆了

The chicks are manna from heaven for an Arctic fox.

对北极狐来说雏鸟可是天赐的佳肴

The next chick is accompanied by a parent.

后面一只雏鸟有父母陪伴

1 vertical   

adj.垂直的，顶点的，纵向的；n.垂直物，垂直的位置

参考例句：

• The northern side of the mountain is almost vertical.这座山的北坡几乎是垂直的。
• Vertical air motions are not measured by this system.垂直气流的运动不用这种系统来测量。

2 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》

3 fully   

adv.完全地，全部地，彻底地；充分地

参考例句：

• The doctor asked me to breathe in,then to breathe out fully.医生让我先吸气，然后全部呼出。
• They soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。