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新奇事件簿(翻译+字幕+讲解+试题):撒哈拉沙漠
日期:2014-09-26 09:56

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中英文本

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Scientists believe the Sahara desert is twice as old as we previously thought. Science books generally say the Sahara is around three million years old. However, a new study from a centre for climate research in Norway says it could be around seven million years old. Researchers used computers to try and calculate when large parts of North Africa became desert. Their tests showed that global warming seven million years ago dried a lot of the land in what is today the African nation of Chad. A sea called the Tethys Sea started shrinking. This made the African summer monsoons less frequent, which helped form sand dunes in Chad. The scientists say this is how the Sahara first started.

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新奇事件簿(翻译+字幕+讲解+试题):撒哈拉沙漠.jpg

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科学家认为撒哈拉沙漠比以前认为的存在时间要长两倍5tSDg%uav]mE1*;。科学书籍一般都写着撒哈拉沙漠存在的时间约为300万年Hb|[FEA&Axmz2U2FQ[。然而,挪威一所气候研究中心的一项新的研究表明,撒哈拉沙漠存在的时间可能是700万年=_,ly2ty=NpU3。研究人员用电脑试着计算北非变成沙漠的时间8@uo-,=s#lG。他们的实验表明,700万年以前的全球变暖造成许多土地变干,形成了现在的乍得国C^rpZb5^avMm。特提斯海开始缩小Ac)_y-3-!!。这使得非洲的夏季风频率变小a,ros+5Z]#。从而形成了乍得国的沙丘;B=#e&fH~C4g^]。科学家称,这就是撒哈拉沙漠最开始形成的状况4TA[F_guJ=rU1!fBA

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新奇事件簿(翻译+字幕+讲解+试题):撒哈拉沙漠.jpg

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The Sahara is one of the world's best-known and largest deserts. It covers about 10 per cent of the whole African continent and forms large parts of Algeria, Chad, Egypt, Sudan and other nations. The sands stretch from the Atlantic Ocean in the west to the Red Sea in the east. Not everyone agrees that the Sahara is as old as the Norway research says it is. Stefan Kröpelin, a geologist in Germany, says real geological evidence is needed to be sure. He said the Norway research is based on numbers and not evidence, saying: "Nothing you can find in the Sahara is older than 500,000 years old". He added that our knowledge of the Saharan climate is only from 10,000 years ago and that our knowledge is "full of gaps".

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撒哈拉沙漠是世界上一片著名的最大的沙漠之一3).&Z3yhSu-aG3gZ+。撒哈拉沙漠面积约为非洲大陆的10%YCo-x9KvatRhBY4。而且覆盖了阿尔及利亚,乍得,埃及,苏丹和其他国家的大部分地区grHfVFg=287YK3f。沙漠从大西洋西部一直延伸至红海的东部zaOy,Yvl|bMv。并不是所有人都认同挪威研究中心对撒哈拉沙漠存在时间的研究结果CMX~*(&9VgW(U_0LFN。德国地理学家斯特芬说,真正的地理证据需要核实s_ryS,R|%xrg&xo。他说,挪威的研究并不是依据证据,而是依据数字*jC3R1n3UKtr-n6S1BVE。他说,在撒哈拉沙漠找到的任何东西的存在时间都小于50万年0!G@bm@Onq3。他还说,我们所知道的关于撒哈拉沙漠地区的气候知识是在1万年以前,并且我们的知识有许多漏洞,9!Q!OQC.%DOR

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译文属可可英语原创,未经允许,不得转载#W0.6hMUx~

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重点讲解

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1.global warming全球变暖
There is no equality and diversity in global warming – in the world today we have “equality in adversity”.
在全球变暖中没有平等性和多样性-在当今的世界,我们有“在逆境中的平等”@fi-s4|jK|QG]W,-UK+3

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2.a lot of许多
We have grown a lot of beautiful roses this year.
今年我们栽种了许多漂亮的玫瑰nJ)FEk,&Ev8rs5

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3.sand dunes[地理] 沙丘(sand dune的复数形式)
Though they cover just 30 square miles, the dunes reach up to 750 feet high and are the tallest sand dunes in the United States.
虽然它的面积仅有30平方公里,但沙丘高达750英尺,是美国最高的沙丘,浅色的沙子堆成了高高的沙丘MPe^RuG-s%!;AC

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4.base on基于,以……为根据;在……基础上
Our destination was a big base on the island of Tulagi in the South Pacific.
我们的目的地是南太平洋图拉吉岛上一个规模很大的基地1P_wsL1V5i39Gt

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5.full of装满;全神贯注于…的
His head is full of nonsense.
他满脑子荒唐念头#~%!kgjWy&Y

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听力试题

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1.Who believes the Sahara desert is a lot older than we thought?
a) writers
b) scientists
c) travellers
d) nomads
2.In which country is the centre that did the research?
a) Chad
b) Peru
c) Sudan
d) Norway
3.What did scientists use to work out the age of the Sahara?
a) carbon dating
b) a magnifying glass
c) computers
d) satellites
4.What became less frequent in African summers 7 million years ago?
a) monsoons
b) visiting dinosaurs
c) heat waves
d) sand storms
5.What formed in Chad that started the Sahara desert?
a) a village
b) sand dunes
c) a river
d) a giant rock
6.How much of Africa does the Sahara cover?
a) 10%
b) 15%
c) 20%
d) 25%
7.How far does the Sahara go to the east?
a) to Kenya
b) to the Indian Ocean
c) to the Red Sea
d) to the Nile river
8.What kind of evidence does Stefan Kröpelin want to see?
a) geological evidence
b) geographical evidence
c) geometric evidence
d) geothermal evidence
9.What did Stefan Kröpelin say the research is based on?
a) guesswork
b) geology
c) sand
d) numbers
10.How far back does our knowledge of the Saharan climate go?
a) 10,000 millennia
b) 10,000 weeks
c) 10,000 years
d) 10,000 centuries

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听力答案

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1.b
2.d
3.c
4.a
5.b
6.a
7.c
8.a
9.d
10.c

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重点单词
  • stretchn. 伸展,张开 adj. 可伸缩的 v. 伸展,张开,
  • diversityn. 差异,多样性,分集
  • frequentadj. 经常的,频繁的 vt. 常到,常去
  • dunen. 沙丘
  • adversityn. 不幸,灾难
  • pacificn. 太平洋 adj. 太平洋的 pacific adj
  • previouslyadv. 先前,在此之前
  • destinationn. 目的地,终点,景点
  • evidencen. 根据,证据 v. 证实,证明
  • globaladj. 全球性的,全世界的,球状的,全局的