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SSS 2008-04-02

时间:2010-05-13 06:10来源:互联网 提供网友:0922013129   字体: [ ]
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This is Scientific American’s 60-Second Science, I am Karen Hopkin. This will just take a minute.

 

Somewhere along the line you've probably heard that you should drink eight glasses of water a day. It’s supposed to make your skin supple1, keep your organs flush and help you avoid overeating. Now doctors from the University of Pennsylvania say that’s hogwash. After exploring the health effects of hydration, they conclude that the purported2 benefits of drinking lots of water are not backed by any solid evidence, or liquid evidence, either. The physicians present their findings in the June issue of the Journal of the American Society of Nephrology. Okay, humans can’t last more than a few days without water. But very little research has been done to assess just how much water a healthy individual needs. So the Pennsylvania docs scanned the literature. They discovered that drinking water does help the kidneys clear out salt and such. But those studies don’t suggest any sort of clinical benefit. There are no studies that show that chugging H2O will curb3 your appetite. Ditto for drinking water to enhance your skin tone. In fact, no studies indicate that people should drink eight glasses of water a day. Where that number came from no one seems to know. But in the end, it turns out to be all wet.

 

Thanks for the minute for Scientific American’s 60-second Science. I am Karen Hopkin.
 


点击收听单词发音收听单词发音  

1 supple Hrhwt     
adj.柔软的,易弯的,逢迎的,顺从的,灵活的;vt.使柔软,使柔顺,使顺从;vi.变柔软,变柔顺
参考例句:
  • She gets along well with people because of her supple nature.她与大家相处很好,因为她的天性柔和。
  • He admired the graceful and supple movements of the dancers.他赞扬了舞蹈演员优雅灵巧的舞姿。
2 purported 31d1b921ac500fde8e1c5f9c5ed88fe1     
adj.传说的,谣传的v.声称是…,(装得)像是…的样子( purport的过去式和过去分词 )
参考例句:
  • the scene of the purported crime 传闻中的罪案发生地点
  • The film purported to represent the lives of ordinary people. 这部影片声称旨在表现普通人的生活。 来自《简明英汉词典》
3 curb LmRyy     
n.场外证券市场,场外交易;vt.制止,抑制
参考例句:
  • I could not curb my anger.我按捺不住我的愤怒。
  • You must curb your daughter when you are in church.你在教堂时必须管住你的女儿。
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