纪录片《我们的地球》 第47期 淡水资源(04)

Giant salamanders, the world's largest amphibian¹, almost two metres long.

大鲵——世界上最大的两栖动物，几乎能长到2米长

They're the only large predator² in these icy waters. They begin their hunt at night.

它们是这些冰水中唯一的大型掠食动物。夜幕降临，它们开始捕猎

These salamanders have an exceptionally slow metabolism³.

大鲵的新陈代谢十分缓慢

Living up to 80 years, they grow into giants.

它们能活80多年，因此长得十分巨大

The fish they hunt are scarce and salamanders have poor eyesight.

可供大鲵捕食的鱼非常稀少，而且它们的视力也很差

But sensory⁴ nodes on their head and body detect the slightest changes in water pressure.

可是它们头上和身上的感官突起能觉察出最轻微的水压变化

Free from competition, these giants can dine alone.

由于没有竞争，这些大家伙得以独自享用美食

Pickings are usually thin for the salamanders,

大鲵的收获通常都比较少

but every year some of the world's high rivers are crowded by millions of visitors.

而世界上的高山河流每年都将迎接成千上万的来访者

The salmon⁵ have arrived. This is the world's largest freshwater fish migration⁶.

鲑鱼来了。这是世界上规模最大的淡水鱼洄游

Across the northern hemisphere, salmon, returning from the ocean to their spawning⁷ grounds,

鲑鱼穿越整个北半球，从海洋回到它们的产卵地

battle their way for hundreds of miles upstream.

奋力逆流而上数百英里

Up here there are fewer predators⁸ to eat their eggs and fry.

只因上游很少有捕食鱼卵和鱼苗的掠食者。

1 amphibian   

n.两栖动物；水陆两用飞机和车辆

参考例句：

• The frog is an amphibian,which means it can live on land and in water.青蛙属于两栖动物，也就是说它既能生活在陆地上也能生活在水里。
• Amphibian is an important specie in ecosystem and has profound meaning in the ecotoxicology evaluation.两栖类是生态系统中的重要物种，并且对环境毒理评价有着深远意义。

2 predator   

n.捕食其它动物的动物；捕食者

参考例句：

• The final part of this chapter was devoted to a brief summary of predator species.本章最后部分简要总结了食肉动物。
• Komodo dragon is the largest living lizard and a fearsome predator.科摩多龙是目前存在的最大蜥蜴，它是一种令人恐惧的捕食性动物。

3 metabolism   

n.新陈代谢

参考例句：

• After years of dieting,Carol's metabolism was completely out of whack.经过数年的节食，卡罗尔的新陈代谢完全紊乱了。
• All living matter undergoes a process of metabolism.生物都有新陈代谢。

4 sensory   

adj.知觉的，感觉的，知觉器官的

参考例句：

• Human powers of sensory discrimination are limited.人类感官分辨能力有限。
• The sensory system may undergo long-term adaptation in alien environments.感觉系统对陌生的环境可能经过长时期才能适应。

5 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？

6 migration   

n.迁移，移居，（鸟类等的）迁徙

参考例句：

• Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
• He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。

7 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。

8 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》