英语听力：探索发现 2012-09-28 长毛象王国 Mammoth—9

 This is Alaska today, a wetland of forests, boggy¹ tundra², lakes and rivers — rivers that still churn out fresh clues to the Ice Age past. This is a brick-sized tooth, and it belong to a woolly mammoth³. Its narrow ridges⁴ of enamel⁵ tell us more about how mammoths lived.

 

Studies of modern elephants suggest that the more grass you eat, the more ridges you need. And mammoth’s teeth have even more ridges than those of any elephants. It seems that mammoths fed almost exclusively on grass. They were gargantuan⁶ grazers.

 

Fossil bones help draw a picture of another well-known grazer, a kind of horse. Wild horses live in small herds⁷. And Beringia would have been the scene of vicious battles between rival stallions. 

 

But Beringia’s horses are now gone. Today their closest living relatives roam the open steppes of central Asia. Like mammoths, horses are predominantly grazers.

1 boggy   

adj.沼泽多的

参考例句：

• Of, resembling, or characterized by a marsh or marshes; boggy. 沼泽般的，湿软的：类似沼泽地的，沼泽地所特有的；多沼泽的。 来自互联网
• The boggy is out of order, would be instead another one! 球车坏了，需要更换一部。 来自互联网

2 tundra   

n.苔原，冻土地带

参考例句：

• The arctic tundra is at the top of the world around the North Pole.北极冻原是指北极点周边的地区，是世界最高的地方。
• There is a large amount of methane gas under the Siberian tundra.西伯利亚的冻土地带之下有大量的甲烷气体。

3 mammoth   

n.长毛象；adj.长毛象似的，巨大的

参考例句：

• You can only undertake mammoth changes if the finances are there.资金到位的情况下方可进行重大变革。
• Building the new railroad will be a mammoth job.修建那条新铁路将是一项巨大工程。

4 ridges   

n.脊( ridge的名词复数 )；山脊；脊状突起；大气层的)高压脊

参考例句：

• The path winds along mountain ridges. 峰回路转。
• Perhaps that was the deepest truth in Ridges's nature. 在里奇斯的思想上，这大概可以算是天经地义第一条了。

5 enamel   

n.珐琅，搪瓷，瓷釉；(牙齿的)珐琅质

参考例句：

• I chipped the enamel on my front tooth when I fell over.我跌倒时门牙的珐琅质碰碎了。
• He collected coloured enamel bowls from Yugoslavia.他藏有来自南斯拉夫的彩色搪瓷碗。

6 gargantuan   

adj.巨大的，庞大的

参考例句：

• My gargantuan,pristine machine was good for writing papers and playing solitaire,and that was all.我那庞大的、早期的计算机只适合写文章和玩纸牌游戏，就这些。
• Right away,I realized this was a mistake of gargantuan proportions.我立刻意识到这是一个巨大的错误。

7 herds   

兽群( herd的名词复数 )； 牧群； 人群； 群众

参考例句：

• Regularly at daybreak they drive their herds to the pasture. 每天天一亮他们就把牲畜赶到草场上去。
• There we saw herds of cows grazing on the pasture. 我们在那里看到一群群的牛在草地上吃草。