横跨美国

It's a crack in the Earth's surface that runs as far as the eye can see.

这是地球表面的一道裂缝 一眼望不到头

But even this is is just a small part of something far bigger.

然而这仅仅是整体中一个很小的部分

To the left is a gigantic slab of the Earth's crust

这是地壳上一个巨大板块的边界

which runs unbroken for over 4,000 miles

完好无损的延绵了7千公里

from here,under the Atlantic,

就从这里开始 穿过大西洋

across the USA,all the way to California.

横跨美国 一直到达加利福尼亚

It's what's known as the North America Plate.

也就是北美大陆板块

The earth's surface is broken up into seven major chunks called plates.

地壳表面分成七大块，称为板块

They are so enormous, that they can carry an entire continent

他们是如此的广袤 他们连同大陆板块

and extend far under the sea.

一直延伸到海底

Strip away the Atlantic and the long boundary between two of plates

剥离掉大西洋你会看到两个板块间

that runs along the ocean floor,is exposed,

长长的分界线 沿着海底

until it rises above the waves,

一直延伸到海岸上

and cuts through Iceland,

穿过冰岛

to eventually join up with the rock face at Thingvellir.

最终在古议会遗址处和岩层汇合

These sheer rock faces were once joined together,

这些岩层曾经是连在一起的

but driven by the churning force of molten rock beneath them,

但受到熔岩下方庞大地质力量的作用

the land was split apart.

陆地被分裂开

重点讲解

1、enormous

a、巨大的;极大的;很多的

The main bedroom is enormous.

主卧室非常大。

There is, of course, an enormous amount to see.

当然有很多可看的。

b、（范围、程度）极大的

It was an enormous disappointment.

真是让人万分失望。

his enormous capacity for brutality.

他的穷凶极恶

2、extend

a、延伸;伸展

The caves extend for some 18 kilometres.

那些洞穴深约18公里。

The main stem will extend to around 12ft, if left to develop naturally.

如果任其自然生长，主干可以长到约12英尺。

b、伸出;凸出

A shelf of land extended from the escarpment.

悬崖上凸出一块空地。

c、持续;延续

The courses are based on a weekly two-hour class, extending over a period of 25 weeks.

这些课程每周上一节课，每节两个小时，持续25周。

d、扩及;波及;包括

The service also extends to wrapping and delivering gifts.

服务项目还包括包装和递送礼物。

The talks will extend to the church, human rights groups and other social organizations.

会谈将涉及教会、人权团体和其他社会组织。

3、split

a、（使）断裂;（使）裂开;分割

In a severe gale the ship split in two.

在一次大风中，船断成了两截。

If the chicken is fairly small, you may simply split it in half.

如果鸡比较小，你把它切成两半就行了。

b、（使）(团体)意见不合；（使）分裂

Yet it is feared the Republican leadership could split over the agreement.

但有人担心，共和党的领导层可能会在该协议上出现意见分歧。

Women priests are accused of splitting the church.

女牧师被指责分裂教会。