The discussion on whether the human race can go against nature by cloning themselves has heated up with the advent of the first cloned sheep Dolly.

随着第一只克隆羊多莉的出现，关于人类是否可以违反自然来克隆自己的讨论日益激烈。

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Finally, it's back to Dolly the sheep - the first mammal in the world to be cloned.

这是世界上第一只克隆哺乳动物——绵羊多利，它于1996年出生。

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He said that even Dolly, the famous sheep that was the first mammal to be cloned, suffered from obesity and brain abnormalities.

他说，甚至第一只克隆哺乳动物，即著名的克隆羊多莉，也患有肥胖症和脑异常。

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In nineteen ninety-six, a sheep named Dolly became the first animal to be cloned.

VOA: special.2010.03.23

Dr. Alan Colman, a member of the team that cloned Dolly the sheep -- the first cloned mammal -- in 1997, told CNN that within 20 years stem cell therapies could be used to treat degenerative diseases such as diabetes, congestive heart failure and Parkinson's disease.

CNN: Cloning success hailed, feared

In 1997, when Dolly the sheep became the first mammal to be cloned from an adult sheep, cloning a human entered the realm of possibility.

CNN: 'Raelian' biochemist insists she will clone human

Dr Ian Wilmut, who created Dolly, the world's first cloned sheep, said it took 277 tries to get it right.

CNN: Team to attempt human cloning