translation.en: It is not that genes account for all of the risk for autism, but yet they account for a lot of that risk, because when you look at fraternal twins, that concordance rate is only 31 percent.
translation.zh: 基因并不是决定自闭症 风险的全部因素。 但基因还是占了很大比例。 因为当你看异卵双胞胎时， 一致率只有31%