在多大程度上归咎于基因并不一定，但是对于那些视力最差的人来说，80%的情况下是由遗传因子导致的。

The extent to which genes are to blame varies, but for those with the worst vision, around 80% of the condition is caused by genetic factors.

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很多冲绳人拥有一种有助于避免发炎和自体免疫反应的遗传因子；然而，基因对于长寿只有百分之十到百分之五十的贡献。

Many Okinawans share a genetic factor that helps prevent inflammation and autoimmune reactions; however, genes can only account for 10 to 50 percent of longevity.

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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.

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