英语听力：探索发现 2013-01-04 冰河新新州 Ice Age Oasis—10

 This is the Virginia opossum, a tree dweller¹ found throughout many of the southern states. It's the only North American marsupial². The young are born premature³ and matured in the mother's pouch⁴. And its only close relatives today are found in Central and South America. The opossum is a rare survivor⁵ from a South America invasion. 

 

In the ice age, there were many other species that had travelled north to Florida, including a giant. This spectacular claw is 40cm long. And it belonged to a creature whose fossil remains⁶ have been found throughout Florida. It's the claw from a giant ground sloth⁷ and it really was a giant—6 metres long and weighing up to 40 tons. It rivalled the mammoth⁸ in size. 

 

Although the giant ground sloth is now extinct, like the opossum, it has family ties in South America. The family resemblance is easy to see. These menacing claws are used as grappling hooks, not weapons. They belong to the tree sloth, a peaceful vegetarian⁹ that spends its time eating leaves. It seems a far cry from our vision and an ice age beast.

1 dweller   

n.居住者，住客

参考例句：

• Both city and town dweller should pay tax.城镇居民都需要纳税。
• The city dweller never experiences anxieties of this sort.城市居民从未经历过这种担忧。

2 marsupial   

adj.有袋的，袋状的

参考例句：

• Koala is an arboreal Australian marsupial.考拉是一种澳大利亚树栖有袋动物。
• The marsupial has been in decline for decades due to urban sprawl from car accidentsdog attacks.这种有袋动物其数量在过去几十年间逐渐减少,主要原因是城市的扩张、车祸和狗的袭击。

3 premature   

adj.比预期时间早的；不成熟的，仓促的

参考例句：

• It is yet premature to predict the possible outcome of the dialogue.预言这次对话可能有什么结果为时尚早。
• The premature baby is doing well.那个早产的婴儿很健康。

4 pouch   

n.小袋，小包，囊状袋；vt.装...入袋中，用袋运输；vi.用袋送信件

参考例句：

• He was going to make a tobacco pouch out of them. 他要用它们缝制一个烟草袋。
• The old man is always carrying a tobacco pouch with him.这老汉总是随身带着烟袋。

5 survivor   

n.生存者，残存者，幸存者

参考例句：

• The sole survivor of the crash was an infant.这次撞车的惟一幸存者是一个婴儿。
• There was only one survivor of the plane crash.这次飞机失事中只有一名幸存者。

6 remains   

n.剩余物，残留物；遗体，遗迹

参考例句：

• He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
• The remains of the meal were fed to the dog.残羹剩饭喂狗了。

7 sloth   

n.[动]树懒；懒惰，懒散

参考例句：

• Absence of competition makes for sloth.没有竞争会导致懒惰。
• The sloth spends most of its time hanging upside down from the branches.大部分时间里树懒都是倒挂在树枝上。

8 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。

9 vegetarian   

n.素食者；adj.素食的

参考例句：

• She got used gradually to the vegetarian diet.她逐渐习惯吃素食。
• I didn't realize you were a vegetarian.我不知道你是个素食者。