SSS听说练习第一期：obesity news

The txet:

% j3 _3 V1 F+ E4 z+ SThis is Scientific American's 60-Second Science.I am Cynthia Graber. This will just take a minute.

; a- t5 ]' o% a1 B* @0 g$ j6 QIt's no secret there is obesity epidemic going on.
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8 q! ?3 n3 c% `7 Y% Z0 x1 nMany researchers blame highly processed carbohydrates, such as high fructose corn syrup and white flour.
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Now scientists at the University of Wisconsin in Medicine have started to tease out the role of the liver in converting those calorie-rich foods into fat.

The researchers isolated a gene in the liver called SCD1, the gene codes for an enzyme that synthesizes fatty acids.
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- g9 q5 t3 a0 W! r4 g# r) M- QMice with the normal gene were fed a diet high in processed carbs. The mice converted those carbs into fat and stored that fat in the body.
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5 M5 f$ c3 b" b. v- m" @. ?$ EBut the mice that lacked that SCD1 gene just burned all those carb colories and stayed skinny.
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6 K* S/ D8 H: s, [4 q7 }  rThis finding reveals that the liver determines whether or not eating refined carbohydrates will lead to fat gain.

; m+ s9 ^3 X% P3 M, kThe researchers say the system is a good example of a direct diet gene interaction.

9 W  }& h2 ^2 r0 {$ ]4 h+ ~; IBut they also say that a drug to turn off that fat making liver gene wouldn't be a good idea.

$ q/ G6 H( M$ f" z$ hWithout that gene, the mice could no longer make glucose. They ended up hypoglycemic, suffering from low blood sugar.
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So the solution is sadly what you already knew--eat fewer processed carbohydrates.

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

carbohydrates：碳水化合物
* ^. i, ]2 Q0 G5 qfructose：果糖
corn syrup：玉米糖浆
hypoglycemic：低血糖的
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# J0 v' [, e( {8 m% t# d. C7 \http://www.tudou.com/programs/view/M8N0wOfHvoE/