地球的力量

Okay, I'm down!Wow!Look at the size of this.

好了，我下来了 喔 看有多大

This is magnificent.That is beautiful.So, lower the gear, please.

真是太神奇了 太美了 请把装备往下放！

Theres actually much more to this amazing cavern than first meets the eye.

这个山洞其实要比第一眼看到 更让人惊叹

But to understand the scale of what happened here,

但是要理解这里究竟发生了多大规模的灾难

you have to go deeper still, underwater.

你必须要更深入，到水下

Cave diving is notoriously risky.It's all too easy to get trapped.

山洞潜水非常危险 很容易被困在里面

But Bernadette's a professional cave diver,

但是伯纳德特是个专业洞穴潜水员

so I'm in good hands.Okay.

所以我有很好的保护者 好了

Descending into the depths of the cenote is like entering a new world.

进入沼穴深处就像进入一个新的世界

Fewer people have visited some of these drowned caverns

到这个洞里潜水的人

than the surface of the Moon.

比登上月球的人还少

As divers have explored further,

潜水员进行越多的探索

they've discovered the cenotes are actually part of a huge complex of tunnels and caves.

他们就会发现沼穴其实是 一片巨大的隧道和山洞组成的

In fact, when you look from above, you can see

实际上，你从上面看

there are cenotes scattered across Mexico's Yucatan Peninsula.

会看到沼穴遍布几百公里

And when they're mapped, it becomes clear that they follow

绘图后，会发现它们在丛林之间

a distinctive circular course through the jungle.

形成了一个明显的半圆形

重点讲解

1、professional

职业的；专业的

His professional career started at Liverpool University.

他的职业生涯是从利物浦大学开始的。

专门从事的；非业余的

This has been my worst time for injuries since I started as a professional footballer.

这是我当职业足球运动员以来受伤来得最不是时候的一次。

Jack Nicklaus has played in every Major Championship since he turned professional in 1961.

杰克·尼克劳斯自从1961年转为职业选手以来参加了四大赛的所有比赛。

（运动）职业性质的

an art student who had played professional football for a short time.

踢过短时间职业足球的艺术系学生

2、descend

下来;下降;走下

Things are cooler and more damp as we descend to the cellar.

当我们往下走去地窖时，四周愈见阴冷潮湿。

She descended one flight of stairs.

她走下了一段楼梯。

(情绪、气氛等)降临，笼罩

An uneasy calm descended on the area.

一种令人不安的平静笼罩了该地区。

A reverent hush descended on the multitude.

人群虔敬地噤了声。

（大批人）突然到来，突然造访

3,000 city officials descended on Capitol Hill to lobby for more money.

3,000名市政官员齐聚国会山，为筹集更多的款项进行游说。

Curious tourists and reporters from around the globe are descending upon the peaceful villages.

好奇的游客和记者从世界各地一齐涌向这些平静的村落。