Different from the embryonic stem cell we talked about before, 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，这是一个成人干细胞的例子。

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

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。

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Researchers cherish lines of embryonic stem cells.

研究人员珍视这些胚胎干细胞系。

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In March, President Obama ended restrictions on the use of federal money for research using human embryonic stem cells.

VOA: special.2009.04.07

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。

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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

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Embryonic stem cell research has repeatedly raised ethical concerns and human eggs are a scarce resource.

BBC: Embryonic stem cells: Advance in medical human cloning

Most researchers agree that one day they will supplant embryonic stem cells in the lab.

FORBES: Scientists Relieved As Supreme Court Passes Over Case Against Embryonic Stem Cell Research

For the tissue-growing experiment, the researchers focused on the clump of cells containing embryonic stem cells.

WSJ: Experiment Brings Human Cloning One Step Closer