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科学美国人60秒 SSS 2013-09-17

时间:2013-11-25 05:26来源:互联网 提供网友:gmeng   字体: [ ]
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    (单词翻译:双击或拖选)

 This is Scientific Americana 60 Seconds Science, I'm Christopher Intagliata,  got a minute.The Sahara desert isn't known for its greenery, but there's evidence it was once much lusher than today, dotted with waterfall and lakes, now a study suggests three massive1 rivers used to plough through the desert too, cutting pathways north to the * coast.    

Researchers use climate models to estimate rainfall more than the 100,000 years ago, they found the ancient * formed four hundreds miles north of where they do today, spreading rain on the mountains and central Sahara, that storm water would have drained north powering three rivers the size of the Nile and forming vast wetland in what is now Libya.  The west most river, referred to as the * was the most likely pass for migrants and clusters2 of archaeological sites in * and * back up to that idea, the analysis is in the journal Plus One. There is no telling whether humans made it to Europe by these routes, but the alternatives were traveling along the Africa's west coast or up the Nile. So these  rivers would offer a nice shortcut3, now of course, the waterways with buried beneath the dooms4, along with any foot prints our ancestors may have left behind. Thanks for the minute, for Scientific American 60 Seconds Science, I'm Christopher Intagliata.  

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1 massive QBRx2     
adj.巨大的,大规模的,大量的,大范围的
参考例句:
  • A massive sea search has failed to find any survivors.经过大规模的海上搜救仍未找到幸存者。
  • He drank a massive amount of alcohol.他喝了大量的烈酒。
2 clusters 831b3f7dcdf3f61e8b31bb7bfa7d6696     
n.(果实、花等的)串( cluster的名词复数 );簇;(人、物等的)群;组v.(使)集中( cluster的第三人称单数 )
参考例句:
  • These small particles agglomerate together to form larger clusters. 这些颗粒聚结形成较大的团。
  • Sometimes several clusters of white clouds drift across the blue sky. 蔚蓝色的天空中,时而飘过几朵白云。 来自《现代汉英综合大词典》
3 shortcut Cyswg     
n.近路,捷径
参考例句:
  • He was always looking for a shortcut to fame and fortune.他总是在找成名发财的捷径。
  • If you take the shortcut,it will be two li closer.走抄道去要近2里路。
4 dooms 44514b8707ba5e11824610db1bae729d     
v.注定( doom的第三人称单数 );判定;使…的失败(或灭亡、毁灭、坏结局)成为必然;宣判
参考例句:
  • The ill-advised conceit of the guardian angel dooms the film from the start. 对守护天使的蹩脚设计弄巧成拙,从一开始就注定这部电影要失败。
  • The dooms of the two are closely linked. 一条线拴俩蚂蚱。 来自《现代汉英综合大词典》
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TAG标签:   美国科学60秒  英语听力
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