纪录片《冰冻星球》 第80期 履于薄冰（12）

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This daring experiment is measuring how the water flowing

这项大胆的试验旨在探究

under the ice sheet affects the speed with which the glaciers²

在冰原底下 水的流动是怎样影响

flow from it, down to the sea.

冰川流向大海的速度

The theory is that the water is acting³ as a lubricant.

原理是 水起到了润滑的作用

So, the more water there is, the faster the glacier¹ flows.

所以水越多 冰川移动的速度就更快

To the naked eye, glaciers don't appear to move at all.

肉眼看来冰川好像岿然不动

But move, they do.

但它确实在移动

These unique time-lapse images

这些快速回放镜头是近四年来

were captured over the last four years.

捕捉到的画面

Through long observations, we now know

通过长时间的观察 我们得知

that Greenland's ice is flowing down to the sea

格陵兰冰川向大海移动的速度

twice as quickly as it was 20 years ago.

是二十年前的两倍

The speed of the glaciers affects our sea levels

冰川的速度影响着我们的海平面高度

because when they reach the water,

因为当它们遇到了水域

they break apart into icebergs⁴.

它们就破碎成冰山

Occasionally, a real mega-berg is born.

很有可能会形成巨大的冰山

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 glaciers   

冰河，冰川( glacier的名词复数 )

参考例句：

• Glaciers gouged out valleys from the hills. 冰川把丘陵地带冲出一条条山谷。
• It has ice and snow glaciers, rainforests and beautiful mountains. 既有冰川，又有雨林和秀丽的山峰。 来自英语晨读30分（高一）

3 acting   

n.演戏，行为，假装；adj.代理的，临时的，演出用的

参考例句：

• Ignore her,she's just acting.别理她，她只是假装的。
• During the seventies,her acting career was in eclipse.在七十年代，她的表演生涯黯然失色。

4 icebergs   

n.冰山，流冰( iceberg的名词复数 )

参考例句：

• The drift of the icebergs in the sea endangers the ships. 海上冰山的漂流危及船只的安全。 来自《简明英汉词典》
• The icebergs towered above them. 冰山高耸于他们上方。 来自辞典例句