在线英语听力室

SSS 2009-12-30

时间：2010-05-19 06:34:53

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（单词翻译）

Before you pay big money for caviar, check with two New York City high school students. Brenda Tan and Matt Cost worked with DNA1 barcoding experts at Rockefeller University and other researchers at the American Museum of Natural History to identify hundreds of food samples, assorted2 hairs and animal bits in their neighborhood. The Trinity School seniors discovered 95 different species of animal and 11 cases of fraudulent food labeling. Their findings appear in the January issue of the journal BioScience.

The professional researchers provided DNA sequences for the samples the students collected. The kids then checked the sequences against the database at barcodinglife.org

The high schoolers found everything from pigeons and Pomeranians to an invasive latrine fly and what looks to be at least a new subspecies of cockroach3. A supposed sheep’s milk cheese was actually from cows. And alleged4 sturgeon caviar was just cheap Mississippi paddlefish eggs. But there was good news: all eight classmates who provided hair for the study turned out to be human.

 


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1 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。
2 assorted TyGzop     
adj.各种各样的，各色俱备的
参考例句：
  • There's a bag of assorted sweets on the table.桌子上有一袋什锦糖果。
  • He has always assorted with men of his age.他总是与和他年令相仿的人交往。
3 cockroach AnByA     
n.蟑螂
参考例句：
  • A cockroach can live several weeks with its head off.蟑螂在头被切掉后仍能活好几个星期。
  • She screamed when she found a cockroach in her bed.她在床上找到一只蟑螂时大声尖叫。
4 alleged gzaz3i     
a.被指控的，嫌疑的
参考例句：
  • It was alleged that he had taken bribes while in office. 他被指称在任时收受贿赂。
  • alleged irregularities in the election campaign 被指称竞选运动中的不正当行为

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