科学家发现这种黑素细胞干细胞缺少一种至关重要的酶，这种酶存在于在皮肤里发现的类似的干细胞里，而皮肤不随着年龄褪色。

Scientists found that such melanocyte stem cells lacked a crucial enzyme that was present in similar stem cells found in the skin, which do not lose colour with age.

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胚胎干细胞如此让人激动是因为它的天然功能就是分化成身体所有的细胞。

Why people are so excited about embryonic stem cells is because in nature they become all the cells of the body.

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离心机将脂肪细胞从干细胞和再生细胞中分离出来，将它们浓缩成一个小球，再萃取出来。

A centrifuge separates the fat cells from the stem and regenerative cells, concentrating them into a pellet, which is then extracted.

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That's where they all come from, they all come from the zygote The word for that is totipotent, totally potent.

这是干细胞的来源,都来源于受精卵,这种细胞称为全能干细胞,具备全部潜能

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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

耶鲁公开课 - 生物医学工程探索课程节选

If we understood them well enough we could potentially make any particular kind of cell in the body from those pluripotent cells.

如果我们能研究得足够透彻,我们就有可能利用这些多能干细胞,制造我们体内任何特定的细胞

耶鲁公开课 - 生物医学工程探索课程节选