英语听力文摘 English Digest 170、永别了，芝加哥

　　Although it is devastating¹ to find out that Chicago is sinking, we’re only talking one millimeter a year. That’s four inches in a century, but only until the land in North America brings itself back into equilibrium².
When glaciers³ covered Canada and the northern Great Lakes tens of thousands of years ago, their weight pushed down on the Earth’s surface and caused it to sag⁴. And this pressure forced the Earth’s mantle⁵, the layer of hot, plastic rock that’s located beneath the Earth’s crust, to give way and ooze⁶ out and sideways. It’s like the Earth is a giant waterbed. When you lie down on it, the surface of the mattress⁷ under you sinks, forcing the water into other parts of the mattress.
In the twelve thousand years since the glaciers receded⁸, the Earth’s crust has been slowly returning to its original shape. So the land in Canada and the northern Great Lakes is slowly rising, while the rest of North America is slowly sinking, like a seesaw⁹, enabling the mantle to flow back north. And as the Lake Michigan floor north of Green Bay rises, all that water sloshes south towards Chicago.

1 devastating   

adj.毁灭性的，令人震惊的，强有力的

参考例句：

• It is the most devastating storm in 20 years.这是20年来破坏性最大的风暴。
• Affairs do have a devastating effect on marriages.婚外情确实会对婚姻造成毁灭性的影响。

2 equilibrium   

n.平衡，均衡，相称，均势，平静

参考例句：

• Change in the world around us disturbs our inner equilibrium.我们周围世界的变化扰乱了我们内心的平静。
• This is best expressed in the form of an equilibrium constant.这最好用平衡常数的形式来表示。

3 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）

4 sag   

v.下垂，下跌，消沉；n.下垂，下跌，凹陷，[航海]随风漂流

参考例句：

• The shelf was beginning to sag beneath the weight of the books upon it.书架在书的重压下渐渐下弯。
• We need to do something about the sag.我们须把下沉的地方修整一下。

5 mantle   

n.斗篷，覆罩之物，罩子；v.罩住，覆盖，脸红

参考例句：

• The earth had donned her mantle of brightest green.大地披上了苍翠欲滴的绿色斗篷。
• The mountain was covered with a mantle of snow.山上覆盖着一层雪。

6 ooze   

n.软泥，渗出物；vi.渗出，泄漏；vt.慢慢渗出，流露

参考例句：

• Soon layer of oceanic ooze began to accumulate above the old hard layer.不久后海洋软泥层开始在老的硬地层上堆积。
• Drip or ooze systems are common for pot watering.滴灌和渗灌系统一般也用于盆栽灌水。

7 mattress   

n.床垫，床褥

参考例句：

• The straw mattress needs to be aired.草垫子该晾一晾了。
• The new mattress I bought sags in the middle.我买的新床垫中间陷了下去。

8 receded   

v.逐渐远离( recede的过去式和过去分词 )；向后倾斜；自原处后退或避开别人的注视；尤指问题

参考例句：

• The floodwaters have now receded. 洪水现已消退。
• The sound of the truck receded into the distance. 卡车的声音渐渐在远处消失了。

9 seesaw   

n.跷跷板

参考例句：

• Prices have gone up and down like a seesaw this year.今年的价格像跷跷板一样时涨时跌。
• The children are playing at seesaw.孩子们在玩跷跷板。