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When scientists announced in february that they had created a clone of an adult sheep--a genetically identical copy named dolly,created in the lablratory from a single cell of the "parent"----rierce debate arose over the pros and cons of trying to clone a human being .
科学家在2月发出声明,他们已经从一只成年羊身上抽取一个单细胞克隆出一只完全一样的小羊"多莉". 对于克隆人,人们的意见不一. |
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