纪录片《我们的地球》 第48期 淡水资源(05)

A grizzly¹ bear. From famine to feast, he's spoilt for choice.

一只灰熊。它已经很久没有打牙祭了，早就盼着这个机会

This Canadian bear is very special.

这只加拿大熊很特别

He's learnt to dive for his dinner.

它学会了潜水捕猎

But catching² salmon³ in deep water is not that easy, and the cubs⁴ have lots to learn.

但要想在深水中捕获鲑鱼可不太容易，熊崽们还要很多东西要学

The annual arrival of spawning⁵ salmon brings huge quantities of food into these high rivers that normally struggle to support much life.

鲑鱼每年都会到河里产卵，于是这些平常只能勉强维持众多动物生计的高山河流终于有了提供饕餮大餐的机会

Although relatively⁶ lifeless,

尽管高山河流的生物量相对较少，

the power of these upland rivers to shape the landscape is greater than any other stage in a river's life.

它们却有能力改变地形在河流扮演的角色中，这才是最主要的

Driven by gravity, they're the most erosive forces on the planet.

它们借助地心引力，成为地球上最大的侵蚀力量。

1 grizzly   

adj.略为灰色的，呈灰色的；n.灰色大熊

参考例句：

• This grizzly liked people.这只灰熊却喜欢人。
• Grizzly bears are not generally social creatures.一般说来，灰熊不是社交型动物。

2 catching   

adj.易传染的，有魅力的，迷人的，接住

参考例句：

• There are those who think eczema is catching.有人就是认为湿疹会传染。
• Enthusiasm is very catching.热情非常富有感染力。

3 salmon   

n.鲑，大马哈鱼，橙红色的

参考例句：

• We saw a salmon jumping in the waterfall there.我们看见一条大马哈鱼在那边瀑布中跳跃。
• Do you have any fresh salmon in at the moment?现在有新鲜大马哈鱼卖吗？

4 cubs   

n.幼小的兽，不懂规矩的年轻人( cub的名词复数 )

参考例句：

• a lioness guarding her cubs 守护幼崽的母狮
• Lion cubs depend on their mother to feed them. 狮子的幼仔依靠母狮喂养。 来自《简明英汉词典》

5 spawning   

产卵

参考例句：

• Encounter sites have a small chance of spawning a "Commander" NPC. 遭遇战地区有很小的几率遇到NPC指挥官。
• Instantly revives your Champion at your Spawning Pool, 9 minute cooldown. 立即在出生地复活你的英雄，冷却时间9分钟。

6 relatively   

adv.比较...地，相对地

参考例句：

• The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
• The operation was relatively painless.手术相对来说不痛。