In doing this within these families, we were able to account for approximately 25 percent of the individuals and determine that there was a single powerful genetic factor that caused autism within those families.
通过对这些家族进行反复对比， 我们能计算出在这些家族中， 大约25%的个体 是由单一，强有力的 基因因素 诱发了自闭症。