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【Earth&Sky】科学家使用成熟细胞代替胚胎干细胞
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听写填空,只写填空内容,不抄全文,3-5个句子,不用写标号,注意标点~
Martin Dym: The adult stem cells, for example in the skin, they produce skin cells. [---1---]
You're listening to Martin Dym who conducts research on adult stem cells at Georgetown University. He said modified adult cells – called induced pluripotent stem cells, or IPS cells – might become an effective alternative to stem cells taken from human embryos.
Martin Dym: [---2---]
But the use of embryonic stems cells raises ethical questions. [---3---]
Martin Dym: So, for example, you can take a skin cell from an adult, put in some genes, and it becomes a pluripotent embryonic stem cell – almost identical to the real embryonic stem cell.
A possible issue: [---4---] [---5---]
I’m Deborah Byrd, E&S, a clear voice for science.
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