So we needed to come up with another source, a renewable source, so we turned our attention to embryonic stem cells.
因此,我们需要一种替代材料,一种可以再生的材料,我们注意到了胚胎干细胞胚胎干细胞。
stem cell research can go on without the ethical dilemma provided by killing embryos.
干细胞研究者可以免受由于杀死胚胎而带来的道德困境。
That's why people are so excited about embryonic stem cells because in nature they become all the cells of the body.
这就是为什么胚胎干细胞如此让人激动,因为它的天然功能就是变成所有身体细胞
The way we did this was to coax embryonic stem cells first to develop into the surface layer.
我们是这么做的,先诱导胚胎干细胞,发育成外胚层。
And unfortunately, in order to get those stem cells, that requires killing the embryo.
而不幸的是,要想得到这些干细胞,就需要杀死胚胎。
Further down this line here are embryonic or let's say adult brain stem cells.
沿着这条线再往后一些就是胚胎,或者就说是成人脑中的干细胞吧
It's this - its cells in this region here, this inner cell mass that that's the source of embryonic stem cells, cells from inner cell mass here.
就是这个,在这片区域的胚胎细胞,即内细胞群,而胚胎干细胞的来源所在,就是源自这里的内细胞群
One of the differences in stem cell populations that you will hear about is you hear about embryonic stem cells and you hear about adult stem cells.
干细胞之间的一个区别,你可能听说过的,那就是既有胚胎干细胞,也有成人干细胞
We were looking for the mouse cells the mouse embryonic stem cells that we had coaxed into early ear cells whether they were able to form ear cells.
再来看看那些经诱导,发育成早期耳细胞的,老鼠胚胎干细胞,能否发育成耳细胞。
is that the, like the best stem cells come from human embryos.
是因为最好的干细胞来自于人类的胚胎。
Different than the embryonic stem cell we talked about before, so it's an example of an adult stem cell.
和我们之前谈到的胚胎干细胞有所不同,因此这是个成人干细胞的例子
So we need to get embryonic stem cells to form surface cells.
那么,我们就应该从表层细胞中提取胚胎干细胞。
They're controversial, I think for obvious reasons, because you have to sacrifice an embryo in order to get them.
这些研究极富争议,我想原因很明显,因为你必须牺牲一个胚胎来取得干细胞
Those are called embryonic stem cells, they are self-renewing, and they are pluripotent, meaning they have many potencies.
这些称为胚胎干细胞,它们可以自我更新,且是多能干细胞,即它们有多种潜能
Those are obvious what the differences are, embryonic stem cells are derived from embryos .
这些名称就明确揭示了它们之间的区别,胚胎干细胞是源自于胚胎
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