Coral reefs are already appreciated for their beauty.

珊瑚绚丽外表已备受赞赏。

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

像珊瑚一样它们是洋托儿所。

The coral reefs absolutely need human intervention to help.

珊瑚绝对需要人类干预助。

Coral reefs are important for many reasons.

珊瑚之所以重要，有很多原因。

Coral reefs are under tremendous threats.

珊瑚正面临巨大威胁。

Let's go back to the coral reefs.

们再回到珊瑚例子上。

Healthy coral reefs have shrunk by nearly half.

健康珊瑚也已经缩减了近一半。

This can hurt ocean structures, called coral reefs.

这可能会伤害被称为珊瑚洋结构。

There's something very odd about coral reefs.

这里珊瑚看上去很奇怪。

Seagrass and kelp are particularly sensitive like coral reefs.

草和带特别敏感，就像珊瑚。

Unfortunately, the coral reef ecosystem is a fragile one.

不幸是，珊瑚是一种脆弱生态系统。

But Darwin also investigated coral reefs and their formation.

但达尔文也调查了珊瑚及其形成方式。

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珊瑚。

Healthy coral reefs are essential to a healthy marine ecosystem.

健康珊瑚对健康洋生态系统至关重要。

The coral reef in Arecibo is part of the beach.

阿雷西博珊瑚是滩一部分。

Coral reefs are often the first indicator of climate change.

珊瑚往往是气候变化第一个迹象。

Coral reefs are sometimes called the 'rainforests of the sea.'

珊瑚有时被称作里热带森林。

We saw some amazing coral reef

们看到了一些令人惊叹珊瑚。

The story out there is that all coral reefs are dying.

据说，所有珊瑚都在逐渐死亡。

Oyster reefs provide much the same function as coral reefs.

牡蛎提供了与珊瑚相同功能。