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美国科学60秒 SSS 2015-02-26

时间：2015-03-25 03:50:56

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（单词翻译）

 Early farming began in the Near East about 10500 years ago. Farming first reached Balkans in Europe some 8 to 9 thousand years ago and then crept westward1. Locals in Britain seperated from mainland by the relatively2 newly formed English Channal did not start farming until about 6000 years ago. But an analysis of sediment3 from a submerged British archaeological site called Bouldner Cliff found something unexpected. Amongst our Bouldner Cliff   samples, we found ancient DNA4 evidence of wheat at the site, which was mot seen in mainland Britain for another 2 thousand years, That's Robin5 Allaby of the university of Warwick. However, wheat was already been grown in southern Europe. It's incredibly exciting because it means Boundler's inhabitants were not isolated6 as priviously thought. In fact, they were in touch, one way or another, with more advanced Neolithic7 farming communities in southern Europe. The work by Allaby and colleagues is in the Journal Science. 

The researchers showed that the wheat remains8 are genetically9 more similar to Near Eastern domesticated10 wheat than to local distant cousins. And they found no evidence of pollen--- meaning that the wheat was almost certainly imported. In an accompanying perspective piece in the journal, archeaologist GL of Durham university writes that the findings show that DNA analysis can help scientists tease out details about historical movement of plants and animal species.    

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1 westward XIvyz     
n.西方，西部；adj.西方的，向西的；adv.向西
参考例句：
  • We live on the westward slope of the hill.我们住在这座山的西山坡。
  • Explore westward or wherever.向西或到什么别的地方去勘探。
2 relatively bkqzS3     
adv.比较...地，相对地
参考例句：
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
3 sediment IsByK     
n.沉淀，沉渣，沉积(物)
参考例句：
  • The sediment settled and the water was clear.杂质沉淀后，水变清了。
  • Sediment begins to choke the channel's opening.沉积物开始淤塞河道口。
4 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句：
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
5 robin Oj7zme     
n.知更鸟，红襟鸟
参考例句：
  • The robin is the messenger of spring.知更鸟是报春的使者。
  • We knew spring was coming as we had seen a robin.我们看见了一只知更鸟，知道春天要到了。
6 isolated bqmzTd     
adj.与世隔绝的
参考例句：
  • His bad behaviour was just an isolated incident. 他的不良行为只是个别事件。
  • Patients with the disease should be isolated. 这种病的患者应予以隔离。
7 neolithic 9Gmx7     
adj.新石器时代的
参考例句：
  • Cattle were first domesticated in Neolithic times.新石器时代有人开始驯养牛。
  • The monument was Stone Age or Neolithic.该纪念碑是属于石器时代或新石器时代的。
8 remains 1kMzTy     
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。
9 genetically Lgixo     
adv.遗传上
参考例句：
  • All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
  • Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
10 domesticated Lu2zBm     
adj.喜欢家庭生活的；（指动物）被驯养了的v.驯化( domesticate的过去式和过去分词 )
参考例句：
  • He is thoroughly domesticated and cooks a delicious chicken casserole. 他精于家务，烹制的砂锅炖小鸡非常可口。 来自《简明英汉词典》
  • The donkey is a domesticated form of the African wild ass. 驴是非洲野驴的一种已驯化的品种。 来自《简明英汉词典》

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