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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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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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Adult stem cells are also problematic, as they are difficult to identify, purify and grow, and simply may not exist for certain diseased tissues that need to be replaced.

成体干细胞也有问题，因为它们很难识别、纯化和生长，而且可能根本不存在某些需要替换的病变组织。

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I learned about HeLa cells in my first basic biology class, and I just became completely obsessed with them from that point on.

我在第一节基础生物课上学习了海拉细胞，从那时起我就完全被它们迷住了。

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The laws are still very unclear. Cells are still taken from people without consent - a lot of people don't realize it.

法律仍然很不明确。细胞仍然是在未经同意的情况下从人身上提取的——很多人没有意识到这一点。

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It's nothing short of a whole new brain..animated by a different form of thinking and a new approach to life.

这完全是一个全新的大脑。被一种不同的思维方式和一种新的生活方式所激励。

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The passage of time is simply an illusion created by our brains.

时间的流逝只不过是我们大脑产生的幻觉。

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