你有没有想过有一个克隆的兄妹，你有没有想过用克隆技术治疗疾病？这些幻想已不再遥远，但克隆对于人类究竟是有利还是有弊呢？
Did you ever imagine having a sister or brother that is the exact replica (复制品) of you? Did you ever imagine having the cure for heart disease or cancer? Well, these fantasies are not far from reach. The way we could reach these fantasies is through a process called cloning. Cloning is the replication of an exact genetic copy of an organism by use of a cell from the donor organism. Cloning can be used in humans, human organs, or even animals.
There are many advantages and disadvantages of cloning. A benefit of cloning is cloning human organs or body parts. If a person has a dysfunctional (机能不良的) liver or heart then they could get it cloned and get a brand new one. These are some of the benefits of cloning. Even though there are a lot of benefits of cloning, there are also disadvantages of it. One disadvantage is whether cloning is ethical. Cloning will bring up a great controversy on whether cloning is the “right” thing to do or not. This controversy is currently going on right now and will be even a greater controversy if the government allows cloning. Many people think that nature should just take its course. Other people think that cloning will be a very good thing to society.,
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克隆是英文“clone”或“cloning”的音译，而英文“clone”则起源于希腊文“Klone”，原意是指以幼苗或嫩枝插条，以无性繁殖或营养繁殖的方式培育植物，如扦插和嫁接。克隆是指生物体通过体细胞进行的天性繁殖，以及由无性繁殖形成的基因型完全相同的后代个体组成的种群。通常是利用生物技术由无性生殖产生与原个体有完全相同基因的个体或种群。
