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出 处:《当代外语研究》1995年第8期3-4,共2页Contemporary Foreign Language Studies
摘 要:Suppose you make your parents so happy,they decide to have another baby just like you.It might be flattering,but how would you feel about having a little brother or sister who is also your twin? A laboratory experiment conducted last fall suggests it may someday be possible.For the first time ever,scientists made exact copies, or clones, of a human embryo.
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