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时间：2015-11-25 06:58:03

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（单词翻译）

Have you ever played with a dog or cat and wondered why they are so tame? How did our ancient ancestors take wild, and potentially dangerous, carnivores and turn them into “man’s best friend”? In 1959 a Russian geneticist name Dmitry Belyaev began an experiment to try and understand how domestication1 worked. He started by selecting 130 of the captive wild foxes from a nearby fur farm that showed the least amount of fear and aggression2 towards humans. With each successive generation he selected which foxes would breed based solely3 on tameness. Only the foxes that behaved in the friendliest and tamest manner towards humans were selected to breed.


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1 domestication a412c94ddc4dddbce0e57281001e9ede     
n.驯养，驯化
参考例句：
  • The first was the domestication of animals. 第一个阶段是驯养动物。 来自《简明英汉词典》
  • In northwestern China, there is no evidence for endemic domestication of any animals. 在中国西北，没有任何当地动物驯化的迹象。 来自辞典例句
2 aggression WKjyF     
n.进攻，侵略，侵犯，侵害
参考例句：
  • So long as we are firmly united, we need fear no aggression.只要我们紧密地团结，就不必惧怕外来侵略。
  • Her view is that aggression is part of human nature.她认为攻击性是人类本性的一部份。
3 solely FwGwe     
adv.仅仅，唯一地
参考例句：
  • Success should not be measured solely by educational achievement.成功与否不应只用学业成绩来衡量。
  • The town depends almost solely on the tourist trade.这座城市几乎完全靠旅游业维持。

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