It is not unusual to produce an excellent quality dog from an outbred litter.

从远缘繁殖中产生一品质极佳的狗并非不寻常的事情。

The way to reproduce an outbred ancestor is to mate two individuals that mimic the appearance and pedigree of the ancestor's parents.

没有这种选择，你就正在降低强调在血系内繁殖中祖先基因的机会。

For utilization of the mouse embryonic stem (es) cells for various purposes, it is desirable that the cell lines are established from various sources such as inbred and outbred mouse strains.

为了充分利用小鼠胚胎干(es)细胞，就必须从众多小鼠品系中分离es细胞系。