Scientists can make undifferentiated stem cells from skin cells.

科学家可以从皮肤细胞中制造未分化的干细胞。

The mother can inherit fetal stem cells, undifferentiated cells that are able to develop into any specialized cell.

母亲可以继承胎儿干细胞，即能够发育成任何特化细胞的未分化细胞。

Like other embryos, turtle embryos are made of undifferentiated cells that become specific cell types, and then organs and tissues, through gene activity and communication between cells.

和其它动物胚胎一样，海龟的胚胎是由同样的细胞组成，这些细胞逐渐分化，通过基因活动和细胞间的沟通，然后形成器官和组织。

In frogs, gene activity showed that even when an embryo looks like an undifferentiated blob-- cells are already starting down the paths to their eventual identities.

在青蛙身上，基因活动表明，即使胚胎看起来像​​一个未分化的斑点——细胞也已经开始走向它们最终的身份。

Some brain cells have a limited ability to be replaced, especially during injury, and they do it by having undifferentiated stem cells - called embryonic stem cells - in the brain activate and mature into a specialized cell.

一些脑细胞拥有有限的再生功能，特别是在损伤时——由一种未分化的干细胞——胚胎干细胞在大脑中激活并分化成某种专门细胞。