For many years, cloning(無性繁殖；複製) had always been though of as only science(科幻小說; 科學) fiction(劇情), but on July 5, 1998, that fiction became a reality.
Dolly the sheep was the first mammal(哺乳動物) to be successfully cloned from an adult(成年) somatic cell(細胞).
Dolly, named after country music legend(傳奇人物) Dolly Parton, lived to theage of six before she died on February(二月) 14，2003.
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