以前找到的很多都是能够导致人肥胖的基因，而“瘦身”基因是首例发现的可以让人变得异常苗条的遗传因子。
While many genes have been identified as leading to obesity, this is the first time a genetic explanation for 'extreme thinness' has been unveiled.
导致肥胖的一个基因第一次被发现，这将会解释为什么有些人非常容易肥胖而一些与他习惯相似的人却能保持苗条。
A gene that contributes to obesity has been identified for the first time, promising to explain why some people easily put on weight while others with similar lifestyles stay slim.
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