单词：embryonic development period
单词：embryonic development period 相关文章
Scientists Come Closer to Creating Laboratory Embryos An international team of scientists says it has moved a step closer to creating artificial embryos. The team used stem cells from mice. Stem cells are simple cells that can develop into other kind
2018年VOA慢速英语(八)月
AS IT IS 2015-11-02 Can Fish Teach Humans to Regrow Teeth? 人类能学习鱼类的牙齿再生术么? Most people are born with two sets of teeth. They use baby teeth to break down food as children. As they become adults, the baby teeth are replaced
2015年VOA慢速英语(十一)月
By Ted Landphair Washington 26 July 2007 For a second time in a year, President Bush has vetoed a bill that would have sanctioned federally funded stem cell research using human embryos. His stance reflects conservatives' view that destroying life to
2007年VOA标准英语（七月）
ARI SHAPIRO, HOST: For the first time, scientists have altered the DNA in human embryos to make a fundamental discovery about early human development. Scientists say this proves that modifying genes and human embryos can reveal powerful insights into
2017年NPR美国国家公共电台9月
Xavier: Hows your novel coming along? Sara: Its not. I abandoned it for now. I think I bit off more than I can chew. Now, Im working on a short story. Xavier: That sounds interesting. Who are the main characters? Sara: Im not sure yet. Character deve
地道美语播客
WASHINGTON, April 16 (Xinhua) -- Researchers at the University of Colorado (CU) have found that lack of a specific gene interrupts neural tube closure, a condition that can cause death or paralysis. The study was the cover story this week in the jour
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