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An asymmetrical division is not like that, it's when a parent cell forms two cells that are different in some way.
而不对称分裂就不是这样,当母细胞分裂为两个子细胞时,会有一些不同
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This stem cell which is reproduced still has the potential to undergo asymmetric division but this one does not.
新生成的干细胞,仍然有潜能进行不对称分裂,但定向祖细胞就不行
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A capability for asymmetric division and the production of cells that become differentiating more mature cells, those are properties of stem cells.
能够完成不对称分裂,以及产生细胞,并分化成为一些更成熟的细胞,这些是干细胞的性质
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Not all the cells are dividing; in fact, cells in your brain don't proliferate at all.
不是所有细胞都能分裂,事实上,脑细胞根本不增殖
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No. All we can say is, there was an 80 percent chance it would, 20 percent chance it wouldn't, so most of them do, some of them don't.
不能,我们只能说,这个原子分裂的概率是百分之八十,不分裂的概率是百分之二十,它们当中的大部分会分裂,而一部分不会
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Now,I don't actually know whether it's true that simple things can't split.
我其实不知道是否简单的东西就不能分裂。
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The size of the cells could be different; maybe mitosis is asymmetrical in some way so that one of the cells ends up being bigger than the other.
细胞大小可能会不同,也许有丝分裂的过程是不对称的,致使子细胞一个大一个小
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What is the difference that's generated during an asymmetric cell division?
不对称分裂的过程中,到底产生了怎么样的变化
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One result of this asymmetrical division is a committed progenitor cell.
这种不对称分裂的一个结果,是产生定向的祖细胞
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So that's asymmetrical division and that's a property of stem cells.
以上说的就是不对称分裂,是干细胞的性质之一
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Sure. There was a 20 percent chance that it wouldn't.
当然,它不分裂的概率是百分之二十
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One is that it's capable of something called asymmetrical division.
一个就是它会有不对称分裂
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This is an example of that asymmetric division.
这就是一个典型不对称分裂的例子
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Now,human bodies,unlike amoebas,don't do that.
虽然人体不像阿米巴原虫一样分裂。
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Or it can the kind of change we talked about before, where during division there are some chemicals that are trapped in one cell and not in the other, and that could lead to a difference we already talked about.
可能是我们之前说过的,在分裂过程中可能发生的,不对称分裂的现象,并导致我们已经讲过的某些不同
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Potential refers to what it sounds like, 'what potential does this committed progenitor cell have?' 'What potential does this stem cell have?' Well, one way to think about is that upon this first division, this asymmetric division, this committed progenitor cell has lost some potential.
这个"潜能"和字面意思相同,定向祖细胞的潜能是什么,干细胞的潜能又是什么,一种看法就是在第一次分化时,即不对称分裂时,定向祖细胞失去了一些潜能
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Now, you know, when we've got our deterministic hats on, we think to ourselves, "There's got to be some underlying causal explanation, some feature about the break-down atoms that explains why they broke down and that was missing from the non-break-down atoms that explains why they don't break down.
现在,你知道,当我们用决定论的观点去分析这个问题时,我们自己寻思着,这背后一定有某种具有,因果关系的解释,某种关于分裂原子的特性,能解释为什么它们分裂了,而由于这种特性不存在于未分裂的原子,因而解释了它们为什么不能分裂
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