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SSS 2009-01-27

时间:2010-05-17 02:59来源:互联网 提供网友:木渐浅。   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 Karen Hopkin. This will just take a minute.

 

You may have noticed that as you get older, you start forgetting more stuff: like, where you left your glasses, or the names of your children. Well, if you’re fed up with those senior moments, put down that pastrami sandwich. Because a new study, published in the January 27th issue of the Proceedings1 of the National Academy of Sciences, shows that cutting calories actually improves memory in older folks.

Calorie restriction2 lets lab animals live longer. And these hungry critters tend to be healthier, too: with lower cholesterol3, better insulin sensitivity, and even slower cognitive4 decline. But these diets can be draconian5. And it hasn’t been clear whether they’d offer the same benefits to people.

In this study, scientists asked 50 elderly women to cut the number of calories they consumed by a third. After three months, the researchers found that the dieters were not only slimmer, but they were better than they had been at memorizing lists of words. They also had better insulin levels and fewer markers of inflammation, which suggests that keeping those things under control may help keep the brain fit. It’s one of the cruel ironies6 of aging: if you want to remember your favorite restaurants, the less you should eat at them.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Karen Hopkin.

 


点击收听单词发音收听单词发音  

1 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
2 restriction jW8x0     
n.限制,约束
参考例句:
  • The park is open to the public without restriction.这个公园对公众开放,没有任何限制。
  • The 30 mph speed restriction applies in all built-up areas.每小时限速30英里适用于所有建筑物聚集区。
3 cholesterol qrzzV     
n.(U)胆固醇
参考例句:
  • There is cholesterol in the cell of body.人体细胞里有胆固醇。
  • They are determining the serum-protein and cholesterol levels.他们正在测定血清蛋白和胆固醇的浓度。
4 cognitive Uqwz0     
adj.认知的,认识的,有感知的
参考例句:
  • As children grow older,their cognitive processes become sharper.孩子们越长越大,他们的认知过程变得更为敏锐。
  • The cognitive psychologist is like the tinker who wants to know how a clock works.认知心理学者倒很像一个需要通晓钟表如何运转的钟表修理匠。
5 draconian Skvzd     
adj.严苛的;苛刻的;严酷的;龙一样的
参考例句:
  • You can't expect the people to obey such draconian regulations.你不能指望人民服从如此严苛的规定。
  • The city needs a draconian way of dealing with robbers.这个城市需要一个严苛的办法来对付强盗。
6 ironies cb70cfbfac9e60ff1ec5e238560309fb     
n.反语( irony的名词复数 );冷嘲;具有讽刺意味的事;嘲弄
参考例句:
  • It was one of life's little ironies. 那是生活中的一个小小的嘲弄。
  • History has many ironies. 历史有许多具有讽刺意味的事。 来自《简明英汉词典》
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TAG标签:   SSS  cognitive
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