原文视听

Alun Hubbard is a glaciologist,
这些瀑布叫做冰川锅穴
studying the enormous power
冰河学家艾伦·哈伯德
of these waterfalls, which are known as moulins.
研究的便是它们的巨大能量
We've got this amazing moulin going off here today.
今天我们找到了这个非凡的冰川锅穴
The water's overflowing from the lake, which is beginning to drain.
从湖里溢出来的水正在慢慢流干
Tonnes of water cas cading down this pipe that is, effectively,
无数吨的水从这里倾泻而下
plummeting to the depths of the ice sheet through
相当于是从一千米高的冰川上
over a kilometre of vertical ice.
骤然跌落至冰原最深处
Alun is here to study where the melt water goes
艾伦来这里是为了研究这些水流去了哪里
and what effect it has on the remaining ice.
以及剩下的冰川会受到什么影响
To do that,
为此
he needs to find a moulin that has recently run dry.
他要找到一个刚流干的冰川锅穴
Just a week ago, there was
仅一个星期前 这里有一个
a three-mile long, ten-metre deep lake here.
三英里长 十米深的湖
The weight of all that water cracked the ice beneath
这些水的重量把下面的冰都压碎了
and the lake drained in just a few hours
湖水倾泻而出
with incredible force.
几小时内就流干了

重点解释

Tonnes of water cas cading down this pipe that is, effectively,plummeting to the depths of the ice sheet through over a kilometre of vertical ice.无数吨的水从这里倾泻而下相当于是从一千米高的冰川上骤然跌落至冰原最深处

effective:有效的, 生效的, 实际的

effective, efficient这两个形容词很容易混淆。

effective表示有效用的。

His teaching was not very effective.

他的教学效果不好。

The new interest rate becomes effective next month.

新利息下月生效。

efficient表示“效率高的”，可指人。

He needs an efficient secretary.

他需要一个高效率的秘书。

The staff was very efficient.

工作人员效率很高。

Alun Hubbard is a glaciologist,studying the enormous power of these waterfalls, which are known as moulins.这些瀑布叫做冰川锅穴冰河学家艾伦·哈伯德研究的便是它们的巨大能量

known as:被称为, 公认为

It's known as the most dangerous part of the city.

那地方都知道是市内最危险的地段。

He is little known as an artist.

他是个不出名的艺术家。