始终显示原文
考满分TOEFL: 小黑人

欢迎使用考满分精听听写

截止昨天,已经有 252988 同学完成了 4103155 次的练习

开始练习 查看新手引导

原文已被隐藏,你可用 快捷键 - 或点击 显示原文 按钮来查看原文

第1段

1 .This is Scientific American 60-Second Science. I'm Cynthia Graber.Got a minute?

该句暂无译文!

2 .The standard story told about domesticating wild animals goes something like this: humans selected individuals with a desired trait—docility, for example¨Cand bred those animals together to produce offspring even more docile than their parents.

该句暂无译文!

3 .Eventually the breeders created a genetic bottleneck that separated domestic animals from their wild relatives.

该句暂无译文!

4 .And they brought their livestock along as they spread across Europe and Asia.

该句暂无译文!

5 .But now a group of scientists has demonstrated that the story is far too tidy, at least when it comes to pigs.

该句暂无译文!

6 .Pigs were domesticated from wild boar at least twice, in Anatolia in present day Turkey and in the Mekong Valley in China, both about 9,000 years ago.

该句暂无译文!

7 .They arrived in Europe about 7,500 years ago.

该句暂无译文!

8 .For this study, researchers focused on European pigs.

该句暂无译文!

9 .They evaluated more than 600 genomes from European and Asian wild boars and domesticated pigs.

该句暂无译文!

10 .And they found that, in Europe, the story of a bottleneck separating domestic from wild animals does not fit the genetic data.

该句暂无译文!

11 .Rather, the model that does fit indicates that there was a frequent flow of genes from wild European boars into the domestic population.

该句暂无译文!

12 .In other words, boars and pigs kept finding ways to get together.

该句暂无译文!

13 .The most likely scenario for the development of the modern pig genome includes gene flow from some species of European wild boars that are now extinct.

该句暂无译文!

14 .But their genes live on, on the farm.

该句暂无译文!

15 .The research is in the journal Nature Genetics.

该句暂无译文!

16 .The authors hope this study will prompt the use of genetics to evaluate the domestication history for other species, including dogs and horses.

该句暂无译文!

17 .They say the incorporation of contemporary and ancient DNA into these modeling scenarios will help elucidate the timing of the domestication of plants and animals and, 'ultimately substantially enhance knowledge of this fascinating evolutionary process."

该句暂无译文!

18 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

该句暂无译文!