求克隆的好处与坏处（英文）

Clone,to a certain degree,is beneficial to mankind.Such disease as Parkinsons will possiblly be cured in the future in the hope of further applying of clone.However,the abuse of this technology will bring human being unthinkable destruction.
But cloning still has some problems.The scientists found that the cloning animal’s Gene has a little different from the original animal.So the life will shorter than the real life.The fact proved that,the cloning sheep Dolly has died.It only has the half life of the common sheep.