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SSS 2011-03-11

时间:2011-04-27 05:14来源:互联网 提供网友:geologyforget   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.

Elephants are smart, social animals. And now we know that they can organize themselves into teams to accomplish tasks.

A research team that included renowned1 primatologist Franz de Waal taught 12 Thai elephants—who already work with human trainers called mahouts—to get a bowl of food by pulling a rope attached to an out-of-reach table.

Then the scientists threaded the rope so that it would take two elephants, pulling both ends at the same time, to move the table. If one yanked an end without its helpmate doing so, no reward.

The pachyderms were paired up. Only if they pulled together could they get the food. The elephants tried the task when they were released simultaneously2 or at staggered times. Even when the release was staggered, an elephant quickly learned that it had to wait for its partner to come and cooperate to get the food. This finding was published in the Proceedings4 of the National Academy of Sciences. Elephants are thus on par3 with apes for fast learning of deliberate cooperation with a partner.

When grouped, individuals also remembered which of the others was their task partner. Because an elephant never forgets…who helped it rope a meal.

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


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1 renowned okSzVe     
adj.著名的,有名望的,声誉鹊起的
参考例句:
  • He is one of the world's renowned writers.他是世界上知名的作家之一。
  • She is renowned for her advocacy of human rights.她以提倡人权而闻名。
2 simultaneously 4iBz1o     
adv.同时发生地,同时进行地
参考例句:
  • The radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
  • The Windows allow a computer user to execute multiple programs simultaneously.Windows允许计算机用户同时运行多个程序。
3 par OK0xR     
n.标准,票面价值,平均数量;adj.票面的,平常的,标准的
参考例句:
  • Sales of nylon have been below par in recent years.近年来尼龙织品的销售额一直不及以往。
  • I don't think his ability is on a par with yours.我认为他的能力不能与你的能力相媲美。
4 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
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