The sheep were cloned using a method called somatic cell nuclear transfer.

绵羊是使用一种称为体细胞核移植的方法进行克隆的。

This process—somatic cell nuclear transfer—has been used for decades to duplicate livestock and pets.

这个过程——体细胞核移植——几十年来一直被用来复制牲畜和宠物。

The process of somatic cell nuclear transfer involves removing genetic material from the nucleus of a host egg cell and replacing it with the nucleus from adult cells.

体细胞核移植的过程包括从宿主卵细胞的细胞核中移除遗传物质，并用成年细胞的细胞核取而代之。