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When we talk about stem cells, we are actually talking about a complicated series of things, including adult stem cells which are largely cells devoted to replacing individual tissues like blood elements or liver or even the brain.

  • -- David Baltimore 大卫巴尔的摩

当我们谈论干细胞时，我们实际上是在谈论一系列复杂的事情，包括成体干细胞。成体干细胞在很大程度上是用来替代单个组织的细胞，比如血液成分、肝脏甚至大脑。

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In making certain things easier for people, technology has actually demotivated people from using their brains. We have all these devices that keep us connected, and yet we're more disconnected than ever before. Why is that?

为了让人们更容易做某些事情，科技实际上让人们失去了用脑的动力。我们拥有所有这些让我们保持联系的设备，但我们比以往任何时候都更缺乏联系。这是为什么呢?

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Through their work with fetal tissue, researchers hope to find ways to harness embryonic stem cells which have the ability to become any type of human cell and could provide new treatments for many illnesses.

通过对胎儿组织的研究，研究人员希望找到利用胚胎干细胞的方法。胚胎干细胞有能力成为任何类型的人类细胞，并能为许多疾病提供新的治疗方法。

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These days, children can text on their cell phone all night long, and no one else is seeing that phone. You don't know who is calling that child.

现在，孩子们可以整晚都用手机发短信，没有人看到手机。你不知道谁在给那个孩子打电话。

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Your brain is built of cells called neurons and glia - hundreds of billions of them. Each one of these cells is as complicated as a city.

你的大脑是由叫做神经元和神经胶质的细胞构成的，它们有数千亿。每一个细胞都像城市一样复杂。

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Pluripotent cells have the ability to grow into any cell in the body.

多能细胞有能力在体内生长成任何细胞。

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