地球的力量

That is until you discover what was brewing in the depths of the stagnant oceans.
直到发现了静止海洋下面 酝酿着的一切才得到解答
This is Green Lake in New York.
这是纽约城的绿湖
It's a mini version of what the oceans were like 250 million years ago.
这是2亿5千万年前大海的小模型

It may look normal, but below the first few feet,
看起来很正常但是在水下数米的地方
the water is stagnant and oxygen-free.
水完全停滞，没有氧气
It's become like this because the lake's incredibly deep
因为湖水很深所以造成了这个结果
and there's only small amounts of fresh water flowing into it.
而且流进水底的只有很少量的淡水
Scientists dive here to discover more
科学家潜到下面
about how those ancient oxygen-free oceans
试图发现那些古老的无氧海洋
caused such devastation to life on Earth.
如何引起地球生物的灭绝
It's risky work because something deadly lurks in these waters.
这工作很危险因为水底有致命的东西
You know you've found it once the water turns pink.
你看到水变成了粉色你就到地方了
This tells you you're swimming in a highly toxic poison.
这说明你在毒性很高的毒药中游
And it builds up as the water stagnates.
被称为二硫化氢水停滞的时候就渐渐产生这种气体
If you'd dived down into the oceans 250 million years ago,
如果你潜入2亿5千万年前的海洋
this is what you'd have seen.
你就会看到这个景象

重点讲解

1、discover
发现(以前不知道的事实)
She discovered that they'd escaped.
她发现他们已经逃跑了。
I discovered I was pregnant.
我发现自己怀孕了。
(第一个)发现
the first European to discover America.
第一个发现美洲大陆的欧洲人
In the 19th century, gold was discovered in California.
19 世纪时，在加利福尼亚发现了金子。
初次接触(某活动并乐在其中)
I wish I'd discovered photography when I was younger.
我要是早点接触到摄影技术就好了。
Discover the delights and luxury of a private yacht.
体验私人游艇的乐趣和奢华。
2、build up
（使）积聚；（使）逐渐增加
The regime built up the largest army in Africa.
该政权逐渐建立起一支非洲规模最大的军队。
The collection has been built up over the last seventeen years.
在过去的17年中，收藏的规模不断扩大。
增强…的体质；建立…的信心
Build her up with kindness and a sympathetic ear.
用友善和富有同情心的倾听来重拾她的信心。
Dr. Johnson and I have been trying to build him up physically.
约翰逊医生和我一直试图增强他的体质。
吹捧；抬举
The media will report on it and the tabloids will build it up.
媒体会报道此事，小报则会大肆吹捧。
Historians built him up as the champion of parliament.
历史学家把他誉为议会的捍卫者。