克隆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组织后代的过程。科学家把人工遗传操作动物繁殖的过程叫克隆，这门生物技术叫克隆技术，含义是无性繁殖。
相关词汇
argument n. 论点，论据
ban v. 禁止
bioethics n. 生物伦理学
cell n. 细胞
clone v. 克隆，无性繁殖
cloning n. 克隆，克隆技术
controversial adj. 有争议的
copy n. 复制，复制品
debate n. 辩论
embryonic adj. 胚胎的
ethical adj. 伦理的.道德的
genetically adv. 基因方面地
identical adj. 完全相同的，一样的
infertility n. 不育
organ n. 器官
replacement n. 代替，代替物
stem n. 主干
therapeutic adj. 治疗的，治病的
tissue n. 组织
transplantation n. 移植
情景对话:
A: I just heard that Dolly had passed away.
B: Who? Dolly who?
A: Not a person, a sheep. Dolly the sheep!
B: You mean the first cloned mammal, Dolly the sheep?
A: Yes. She lived until the age of six.
B: She was born in 1996 and that was the first time I heard about cloning.
A: Same here. And I bet "embryonic stem cell" is another term that became popular back then.
B: Sure! Speaking of cloning, it has raised some ethical issues and debates are always going on.
A: Yes. Some people support human cloning in that it can help cure infertility. But have you ever thought of the possibility of making a genetically identical copy of yourself or someone you know?
B: Um, I find it creepy.
A: Me too. But despite arguments against cloning, I think the rapeutic cloning is absolutely beneficial to humans.
B: Right. People with a failing organ can have replacement for it.
A: And that would make organ transplantation much easier.
参考译文:
A:我刚听说多利去世了。
B:谁?哪个多利?
A:不是谁，是只绵羊。绵羊多利啊!
B:你说的是第一只克隆出来的哺乳动物，绵羊多利?
A:是啊。它活到了六岁。
B:嗯，1996年它出生的，那时我第一次知道了克隆这回事。
A:我也一样。当时另外一个为人熟知的词估计就是“胚胎干细胞，了。
B:肯定的!克隆技术也引发了一些伦理道德问题，围绕它的争论一直没有停息过。
A:的确。有些人对克隆人类持赞成态度，因为这有助于解决不孕不育症。不过，制造出一个和你自己或某个你认识的人基因完全相同的克隆人.你想过这种可能性吗?
B:哦，我觉得这挺瘆人的。
A:我也这么觉得。不过，虽然对克隆存在各种争论.我觉得治疗性的克隆技术是对人类有益的。
B:没错。某一器官衰竭的病人可以获得可替代的器官。
A:而且这样一来，器官移植也更容易实现了.
