【摘 要】
：
In November 2001, an American company annouced it had cloned the first human embryo(胚胎)using the same technique(技术)that produced Dolly the Sheep(多利羊)back
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In November 2001, an American company annouced it had cloned the first human embryo(胚胎)using the same technique(技术)that produced Dolly the Sheep(多利羊)back in 1997.
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