【Earth&Sky】科学家预计将会在干细胞研究中取得进步_英语听力练习mp3下载-自然-沪江听力酷

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【Earth&Sky】科学家预计将会在干细胞研究中取得进步

听力简介：

听写填空,只写填空内容,不抄全文,4个单词/词组+1个句子,不用写标号,注意标点~最后主持人自我介绍不写~

Human embryonic stem cell lines are cultures of human cells. Many scientists believe in their potential to cure diseases and repair human tissues. Beginning in 2001, President Bush limited federal funding for stem cell research to only those few cell lines [---1---] by him.

Richard Hynes: The cell lines that Bush had approved are really not very good. And so the people who have been able to work on them with federal funding – they'd been [---2---] by the fact that they weren't dealing with the best cells that they should have been.

That's MIT professor Richard Hynes, who in 2005 helped the U.S. National Academy of Sciences create [---3---] for stem cell use. He's speaking about President Barack Obama's 2009 move to lift Bush's limits on stem cell research.

Richard Hynes: They'll now be able to do that, to work on all these [---4---] cell lines that are out there and will be approved. And it will make available more funding for more people.

Bush had approved 21 already-existing stem cell lines. In 2009, the National Institutes of Health is considering the use of about 700 new cell lines, Hynes said.

Richard Hynes: [---5---] In many cases, scientists will make lines available to other people, so that everyone can use the best materials. And that's what will be possible now.

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