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U.S. researchers said Tuesday that they have identified an enzyme that may play a central role in the development of obesity in mid-life. 美国研究人员上周二表示，他们发现了一种可能在中年人发福现象中起到核心作用的酶。 In two groups of mice being fed high-fat foods, those who received an inhibitor that blocked the enzyme had a 40 percent decrease in weight gain compared with those that did not receive the drug. 在两组喂食高脂肪食物的小白鼠中，一组被使用了阻断这种酶的抑制剂，结果发现，相比于另一组没有用药的小白鼠，这组小白鼠的体重增加量要低40%。 The findings, published in the U.S. journal Cell Metabolism, could upend current notions about why people gain weight as they age, and could one day lead to more effective weight-loss medications. 刊载于美国杂志《细胞新陈代谢》上的该发现，可能会颠覆人们对于随着年龄增长身体发福这一现象的认知，或许有一天能够有助于研制出更有效的减肥药。 | 
