地球的力量

It's a land of gorges, canyons and barren rock

那里到处是峡谷，溪谷和废石

covering thousands of square miles.

大概四千平方公里的区域

It's known as the Scablands.

这里是著名的火山地带

Vic Baker is a geologist who has spent 40 years

维克贝克是一位地质学家他花了四十年时间

trying to discover exactly what took place here.

探索这里发生了什么

The landscape creates this impression of something fantastic that happened,

这里的地貌不禁让我们产生这样的想法：这里发生了什么奇妙的事情

and as you drive through it, you can have a sense

你开车经过这里，你就会感觉到

that you're following the path of that great catastrophe.

你正开在发生过可怕的大灾难的地方

Around 16,000 years ago, a giant lake formed, Lake Missoula

,一万六千年前，一个巨大的湖泊--密苏拉湖形成了

that was held back by nothing more than a wall of ice,

那时候当地只有如围墙般的冰层

a part of what's known as the Cordilleran ice sheet.

它是著名的北部大冰原的一部分

Behind me would be the ice dam

我的背后便是冰坝

that was holding in glacial Lake Missoula

那是冰河时期的密苏拉湖

and it was holding back a phenomenal amount of water.

它含有相当大量的水资源

As the huge mass of water built up behind the dam year after year,the dam began to weaken.

一年接着一年，大量的水资源成为水坝的一部分 水坝开始变得脆弱

Until the ice gave way in a catastrophic failure.

而后冰层灾难性的塌陷

A mass of water larger than lakes Eerie and Ontario combined.

爱尔兰海大量的海水

The force of water rushing forward was like releasing a bomb.

无所阻挡的奔腾水流的冲击力如同炸弹般

It generated a Shockwave of air.

产生一种空气冲击波

重点讲解

1、impression

印象;感想

What were your first impressions of college?

你对大学的第一印象是什么？

My impression is that they are totally out of control.

我的感觉是它们完全失去了控制。

(通常有悖事实的)感觉,假象

I don't want to give the impression that I'm running away from the charges.

我不想给人一种我在逃避指控的感觉。

He cleverly inserted mirrors above the window to create an impression of space.

他巧妙地在窗子上面镶嵌了几面镜子，以营造一种空间感。

产生影响;起作用

He has told me his plans and he's made a good impression on me.

他告诉了我他的计划,给我留下了一个好印象。

The aid coming in has made no impression on the horrific death rates.

逐渐到达的救援对可怕的死亡率并没有起到什么作用。

2、hold back

（使）犹豫;（使）退缩

The administration had several reasons for holding back.

政府因为几个原因而犹豫不决。

Melancholy and mistrust of men hold her back.

忧郁的性格和对男人的不信任使她裹足不前。

阻挡;阻止

Stagnation in home sales is holding back economic recovery.

国内销售的停滞不前正阻碍着经济复苏。

Jake wanted to wake up, but sleep held him back.

杰克想要醒来，但睡意使他又沉入梦乡。

抑制住,忍住(眼泪、笑声等)

She kept trying to hold back her tears.

她一直在试图抑制住眼泪。

He could no longer hold back convulsive laughter.

他再也忍不住，前俯后仰地大笑起来。