听力原文

落基山国家公园 位于科罗拉多州的落基山国家公园成立于1915年，占地415平方英哩，三分之一的园区位在林线以上，并且包括了78个海拔超过12000尺的山峰；其中最高的是久久峰(Longs Peak)，高达14255尺。公园里自成一个完整的生态体系，不论海拔高低，到处都可见到野生动物的踪迹，像是麋鹿、长耳鹿(mule deer)、土狼(coyote)、角鹿和大角羊等等。此外贯穿大峡谷的科罗拉多河，也是在此地发源。

Seventy million years ago, a great inland sea disappeared and the Rocky Mountains emerged from the seafloor. Sixty million years ago, they reached their peak height, twice what it is today. Then for millions of years, the Rockies slowly eroded away to half their original height until 3 million years ago, another dramatic chapter in their story began that would transform them into the Mountains we know today.

Geologist and photographer Bob Anderson takes to the air. He is looking for clues that will tell him how the Mountains have evolved. First he flies over Boulder Canyon in the Colorado Rockies. It is an area that has remained almost unchanged over millions of years.

"So this is Boulder Canyon we are flying up right now. And you can see how the river has in size maybe a few hundred feet down into otherwise relatively rolling terrain."

The mountain peaks that existed on the young Rocky Mountains were rounded off as rivers and streams eroded the rock.

"It's this rolling terrain that the landscape look like in the aftermath of the mountain building event that ended about 50 million years ago."

But as Anderson climbs higher to Longs Peak in the Rocky Mountain National Park, the terrain changes. Instead of rolling hills, there are rugged mountains with steep and jagged cliffs. It's evidence that another force has been at work.

The most famous of these cliffs is the Diamond. Named for its shape, it's a vertical wall with a sheer 900 foot drop. The summit about 45,000 square feet is the same size as a football field.

"Well, we are flying beside, ur, Longs Peak, one of the biggest climbing challenges in the Rockies. For a century, it's been a climbing Mecca. It's a gorgeous, intact piece of rock."

This awesome wall is the most difficult climb in the whole of the Rockies. And since it was officially open to climbers in 1960, has claimed over 50 lives.

小编有约：一切的事物不论是人也好，还是事情也好，总是在变动，究竟是我们改变了时间，还是时间改变了我们，谁也说不清，道不明？一切事物存在，必有它的理由，一件事物消亡，也有它的原因，所以总是有人对这个世界的一切充满了疑问，想要一探究竟。那么今天我们去的落基山国家公园里面，会有什么大自然的鬼斧神工出现。

课后题目：究竟是什么样的原因使得这里看起来就像是在50万年前洛基山脉经历灾难之后的样子？

听力答案

呵呵~~答案就在"It's this rolling terrain that the landscape look like in the aftermath of the mountain building event that ended about 50 million years ago."看看在文中的哪里？仅供参考！

参考译文
七千万年前，一个巨大的内陆海消失，然后落基山脉从海底浮出。6000万年前，落基山脉山顶的高度是今天的两倍。 数百万年前，落基山脉一点点的开始慢慢侵蚀掉自己原来近一半的高度，然而直到300万年前，落基山脉故事中另一个戏剧性的章节拉开了帷幕，把落基山脉转变成我们今天所看到的山。

地质学家兼摄影师鲍勃?安德森坐在了飞机上。他正在寻找线索，这些线索也许会告诉他落基山脉是如何演变的。首先，他飞过位于科罗拉多落基山脉的波尔德峡谷。这个地方经过了数百万年几乎都没有什么改变。

我们正飞在波尔德峡谷的上空，可以看到河流的大小也许就几百英尺，和这里高下起伏的地势配合得相得益彰。

在落基山脉的山峰显得那么的瘦骨嶙峋，原因是河流和溪流不停地侵蚀着这里的岩石。

正是这种起伏的丘陵地形让这里的景观看起来就像是在50万年前洛基山脉经历灾难之后的样子。

但是随着安德森飞的越来越高，飞到了洛基山国家公园的久久峰，这里的地形开始变化。这儿不是连绵起伏的丘陵，而是陡峭的悬崖和锯齿状的峭壁。证明了还有另外一种力量在起作用。

这些悬崖中最有名的是钻石悬崖。由于它的形状与笔直的墙面垂直居然能有900英尺， 更奇的是，顶点约45,000平方尺，就像一个足球场的大小。 所以就叫它钻石悬崖。

嗯，好吧，我们正在久久峰的旁边，这可是攀爬落基山脉的最大挑战之一，一个世纪以来，它已经成为了攀岩的圣地，这是一块完整的令人惊叹的岩石。

这堵可怕的墙是整个落基山脉最难攀登的山峰。 因为自从1960年正式开放后，有超过50人葬送于此。

重点讲解

注释：① disappear vi. 消失；失踪；不复存在
vt. 使…不存在；使…消失
例句：
1. If the sun were to disappear, what would the earth be like?
万一太阳消失了，地球会变成什么样子？
2. Red squirrels disappear inside trees, frogs go deep under the mud, and many other animals dig tunnels in the earth.
红松鼠藏到树里面去了，青蛙钻入泥土的深处，而许多其它的动物，则在地里挖坑道。

② emerge vi. 浮现；摆脱；暴露
例句：
1. New problem emerge as they discus further.
随着他们讨论的深入新的问题也冒了出来。
2. A multitude of heroic figures emerge.
大量英雄人物出现了。

③ aftermath n. 后果；余波
例句：
1. Life was much harder in the aftermath of the war.
战祸之后，生活艰苦多了。
2. If one delays cutting till an advanced state of maturity, aftermath growth will be slow.
如果等到成熟后期再收割，以后的牧草生长将变得缓慢。

句子讲解：

1. The mountain peaks that existed on the young Rocky Mountains were rounded off as rivers and streams eroded the rock.

【结构简析】"rounded" 是形容词圆形的；丰满的；全面的的意思。在这里off 是离开；脱落的意思，所以就可以翻译成瘦，因为是山峰的形状，所以可以译成瘦骨嶙峋。

【参考译文】 在落基山脉的山峰显得那么的瘦骨嶙峋，原因是河流和溪流不停地侵蚀着这里的岩石。

2. Instead of rolling hills, there are rugged mountains with steep and jagged cliffs.

【结构简析】"rolling hills"变成了"rugged mountain"，"instead of "后面接比较的成分。

【参考译文】这儿不是连绵起伏的丘陵，而是陡峭的悬崖和锯齿状的峭壁。