On the other hand, there is a difference between those fraternal twins and the siblings, suggesting that there are common exposures for those fraternal twins that may not be shared as commonly with siblings alone.
另外，异卵双胞胎之间的一致率 与普通兄弟姐妹的一致率也不同， 这表明了异卵双胞胎共享的 一些介质 是普通的兄弟姐妹 无法共同接触到的。