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What do we know of the marine world, of which we see only the surface,and which covers three-quarters of the planet?
对海洋世界我们了解什么？它覆盖了地球四分之三的面积。
The ocean depths remain a secret.
海洋深度仍是个秘密。
They contain thousands of species whose existence remains a mystery to us.
海洋中存在的数千物种对我们来说也是一个谜。
Since 1950, fishing catches have increased fivefold,from 18 to 100 million metric tons a year.
自1950年起 渔业捕获量增加了5倍,由每年一千八百万吨增至一亿吨。
Thousands of factory ships are emptying the oceans.
数以千计的加工渔船淘空海洋。
Three-quarters of fishing grounds are exhausted,depleted or in danger of being so.
四分之三的渔场已枯竭,废弃或是频临废弃。
Most large fish have been fished out of existence,since they have no time to reproduce.
大型鱼类已所剩无几,因为没有时间繁殖。
We are destroying the cycle of a life that was given to us.
我们把上苍赋予的生命循环摧毁了。
On the coastlines, signs of the exhaustion of stocks abound.
在海岸线上 到处都是资源耗尽的迹象。
First sign: Colonies of sea mammals are getting smaller.
第一幕：海洋哺乳动物的栖息地越来越小。
Made vulnerable by urbanization of the coasts and pollution,they now face a new threat: famine.
海洋沿岸的城市化和污染已让它们变得异常脆弱,现在它们又要面对一个新的威胁:饥荒。
