The great barrier reef is the world's largest network of coral structures.

堡礁是世界最瑚礁群。

Like coral reefs, they are a nursery for the oceans.

像瑚礁一样它们是海洋托儿所。

Coral reefs are already appreciated for their beauty.

瑚礁绚丽外表已备受赞赏。

The reefs and rough waters made it difficult for ship captains.

瑚礁和汹涌海水使船长难以驾驭。

But when reefs are bleached or damaged, the fish flee, and the reef suffers.

但当瑚礁白化或受损后，鱼群会逃走，礁石也会遭受破坏。

Unfortunately, the coral reef ecosystem is a fragile one.

不幸是，瑚礁是一种弱生态系统。

Far better, some say, to turn old rigs into coral reefs.

若要全面考虑话，有些人认为应该把老钻塔转换成瑚礁。

One of the more interesting mollusks to be found in the reefs is the giant clam.

在瑚礁内能找到有趣软体动物之一就是巨型蛤蚌。

Both offer stunning views of tropical waters dotted with colourful fish and coral reefs.

这两地都可以欣赏到热带水域壮丽景色，那里点缀着五颜六色鱼类和瑚礁。

They help to (inaudible) and create reefs.

它们帮助形成(听不见)瑚礁。

Next, we're talking about coral, Carl? No, coral, specifically coral reefs.

接下来，我们来谈谈瑚吧。我名字Carl？当然不是，是瑚，具体来说是瑚礁。

Shout out today goes out to Coral Reef High School.

今天要声喊出名字是瑚礁高中。

They can hear the sounds of healthy reefs.

它们可以听到健康瑚礁声音。

Some corals take hundreds of years to regrow.

而瑚礁往往要数百才能再生。

In which nation would you find the Ningaloo Reef?

你能在以下哪个国家找到宁格罗瑚礁？

Almost everything we know about coral reefs comes from the top 30 meters or so.

我们对瑚礁几乎所有了解都来自水下30米左右地方。

We now know that because of that effort, our reefs are more resilient.

我们现在知道，由于这些努力，我们瑚礁更有适应力。

The reef is located in what's called an oceanic twilight zone.

此瑚礁位于所谓海洋曙光区。

Beaches that have been mined to become barren pits, reefs and fish populations are killed.

被开采海滩变成了贫瘠坑，瑚礁和鱼类种群都被杀死了。

The surfers are happy they saved the reef.

冲浪者们很高兴他们拯救了瑚礁。