英语听力：自然百科 冰冻星球 前往地球尽头—7

 This, Jakobshavn Isbrae, is the fastest flowing glacier¹ on our planet, moving as much as 14 meters a day. As it advances, it destroys everything in its path, even cutting its way through Greenland's great mountain ranges on its drive downwards² towards the sea. 

 

When speeded up, these solid rivers of ice seem to flow, just like liquid rivers. 

 

This is the titanic³ force that cuts down mountains and levels the surface of continents. 

 

The ice is now entering the last stage of its descent. As it gains speed, huge crevasses⁴ open that extend out to its very core. It’s reached the ocean and millions of tons of ice have lost the support of their rocky bed. Something must give. These ice falls are an ominous⁵ sign of what is about to happen, a rupture⁶ deep within the glacier.

1 glacier   

n.冰川，冰河

参考例句：

• The glacier calved a large iceberg.冰河崩解而形成一个大冰山。
• The upper surface of glacier is riven by crevasses.冰川的上表面已裂成冰隙。

2 downwards   

adj./adv.向下的（地），下行的（地）

参考例句：

• He lay face downwards on his bed.他脸向下伏在床上。
• As the river flows downwards,it widens.这条河愈到下游愈宽。

3 titanic   

adj.巨人的，庞大的，强大的

参考例句：

• We have been making titanic effort to achieve our purpose.我们一直在作极大的努力，以达到我们的目的。
• The island was created by titanic powers and they are still at work today.台湾岛是由一个至今仍然在运作的巨大力量塑造出来的。

4 crevasses   

n.破口，崩溃处，裂缝( crevasse的名词复数 )

参考例句：

• Splays are commonly formed by currents from crevasses in levees. 嗽叭形堆积通常由堤防决口的洪流所形成。 来自辞典例句
• The upper surface of glacier is riven by crevasses. 冰川的上表面已裂成冰隙。 来自辞典例句

5 ominous   

adj.不祥的，不吉的，预兆的，预示的

参考例句：

• Those black clouds look ominous for our picnic.那些乌云对我们的野餐来说是个不祥之兆。
• There was an ominous silence at the other end of the phone.电话那头出现了不祥的沉默。

6 rupture   

n.破裂；(关系的)决裂；v.(使)破裂

参考例句：

• I can rupture a rule for a friend.我可以为朋友破一次例。
• The rupture of a blood vessel usually cause the mark of a bruise.血管的突然破裂往往会造成外伤的痕迹。