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BBC新闻讲解:饮食与人类行为(2009-3-26)

发表时间:2009-04-02内容来源:VOA英语学习网
Diet and Human Action Child: At dinner time I had chips, bottled milk, packing CRIsps and these little packet biscuits and a drink of tango, orange drink. Woman: These kinds of industrial foods is very common now because it's easier to buy and just give the babies the food 1 preparing everything, uh, everyday. Boy: I like the normal food but I will like to have some junk food at sometimes, twice a week. Man: The industrialization of food has lead us to make uNPRecedented changes to human diet and unfortunately in doing so, we have made uNPRecedented changes to the brain's function and environment. Because 2 , what we eat is going to go directly into the blood supply. Reporter: Over the last twenty thirty years, scientists have become more and more convinced about the link between our diets and the way we behave, feel and think. 3 , the industrialization of food has preceded a pace with little apparent consideration given to its possible impact on our brains. Previously research has suspected that the ingredients in highly processed foods, such as chemical additives were implicated in antisocial behavior for example. Now, increasingly a deficiency in the diet is seen as the bigger culprit. In this edition of the BBC Discovery program, we'll be looking at some of the latest evidence. Now CRItics argue that scientist are still foraging in the dark, the research has not yet made a convincing cast iron case linking specific individual nutrients to adverse affects on behavior and mood. And neither, is their agreement on the need for wide scale presCRIption of supplements, even so there is no shortage of people testifying to dramatic changes in behavior brought about by altering our diets. Bernert Gesh, from the University of Oxford is an expert in the field; he's worked in the UK's criminal justice system where the perpetrators of some crimes receive sentences that include a dietary prescription. Dr. Gesh recalls the remarkable case of a repeat offender who benefited from this enlightened system. Dr. Bernet Gesh: All they ever use to do was steal trucks in the early hours of the morning, the call became some what exasperated with him because on the three occasions he was released from prison, he chose to steal a truck to return home. Now we assessed him and we 4 found that he had a condition known as flat curve hypoglycemia and indeed if you looked at his diet, his behavior it began to make a great deal of sense, because he was absolutely shoveling in stimulants such as coffee, sugar etc. and by the end of the day, which is when he was stealing the trucks, he, by his own admission was as high as a kite. And what was found was by giving him some supplements to improve his sugar control, he stopped offending. Reporter: But, it not just about sugar intake, there's another major group of components of our diets which dominates the very fabric of the brain and it's functioning. The psychiatrist, Joseph Hibbeln of the U.S National Institutes of Health has been intrigued by them since his early days at medical school. Joseph Hibbeln: When I was a medical student in the anthropotomy lab and a brain cut, and I held a brain, and I was looking at it and I said, what's these stuff made of? It's not protein, it's not bone, it's not muscle, this brain is made, almost entirely of fats and lipids. So, it was not to my mind a great jump to say, well if there was a biochemical abnormality regulating the composition of the lipids in the brain the brain might not function well. And as a 5 , I look at emotion and cognition and those human brain functions as a sign that the brain's not functioning well. Reporter: So, lipids and fats are important components of the brain. And in recent years the attention of researchers have been drawn to the essential fatty acids, essential because we can't make them ourselves we have to have them in the food we eat. There are two main varieties the omega-3 fatty acids, are found in fish and other kinds of seafood and green leafy vegetables. Another type the omega-6's, are found in vegetables oils, nuts and grains, we need both of them but the balance between the two is crucial. ■填空答案■ 答案:1.instead of 2.basically3.At the same time 4.actually 5.psychiatrist 来自:VOA英语网 文章地址: http://www.tingvoa.com/html/20090402/1213.html
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