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SSS 2011-04-29

时间:2011-05-12 05:47来源:互联网 提供网友:wp661375   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.

It can be tough to keep up with dietary trends. Like eating eggs: good for you or bad? But one thing is certain. Taking a multivitamin is a healthy choice. Isn't it? Not necessarily. Because researchers have found that people who take dietary supplements may make less healthful choices. The work appears in the journal Psychological Science.

Half the population uses some sort of dietary supplement, and that figure is on the rise. Yet we don't seem to be getting any healthier. So researchers took a closer look at how people who pop health pills actually behave. One group of volunteers was asked to take a dietary supplement, the other group was told they were getting a placebo1. In fact, both groups received dummy2 pills. But it turns out that subjects who thought they'd taken a supplement made less healthy choices, opting3 for the buffet4 instead of an organic meal and walking less than their supplement-deprived pals5.

It could be that folks who supplement feel like they've already done their duty when it comes to their health. So they're more likely to indulge. Which suggests that these pills might not make us healthy, and certainly don't make us smart.

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 placebo placebo     
n.安慰剂;宽慰话
参考例句:
  • The placebo has been found to work with a lot of different cases.人们已发现安慰剂能在很多不同的病例中发挥作用。
  • The placebo effect refers to all the observable behaviors caused by placebo.安慰剂效应是指由安慰剂所引起的可观察的行为。
2 dummy Jrgx7     
n.假的东西;(哄婴儿的)橡皮奶头
参考例句:
  • The police suspect that the device is not a real bomb but a dummy.警方怀疑那个装置不是真炸弹,只是一个假货。
  • The boys played soldier with dummy swords made of wood.男孩们用木头做的假木剑玩打仗游戏。
3 opting e6a09ce5b5c8079c1654586c4e1dc5b3     
v.选择,挑选( opt的现在分词 )
参考例句:
  • What courses are most students opting for? 多数学生选什么课程? 来自《简明英汉词典》
  • Wells doesn't rule out opting out and then re-signing with Houston. 威尔斯没有排除跳出合同再与火箭重签的可能。 来自互联网
4 buffet 8sXzg     
n.自助餐;饮食柜台;餐台
参考例句:
  • Are you having a sit-down meal or a buffet at the wedding?你想在婚礼中摆桌宴还是搞自助餐?
  • Could you tell me what specialties you have for the buffet?你能告诉我你们的自助餐有什么特色菜吗?
5 pals 51a8824fc053bfaf8746439dc2b2d6d0     
n.朋友( pal的名词复数 );老兄;小子;(对男子的不友好的称呼)家伙
参考例句:
  • We've been pals for years. 我们是多年的哥们儿了。
  • CD 8 positive cells remarkably increased in PALS and RP(P CD8+细胞在再生脾PALS和RP内均明显增加(P 来自互联网
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