位置:首页 > 英语听力 > 新视野大学英语听力 > 新视野大学英语听力mp3第三册
新视野大学英语读写教程听力 第三册 te-unit08-a
日期:2012-05-06

[05:20.70]simply as an organ donor.
[05:23.76]But some parents already produce second children
[05:28.40]with nonfatal transplants in mind,
[05:31.64]and many experts do not oppose this.
[05:34.88]Cloning would increase the chances for a tissue match
[05:39.81]from 25 percent to nearly 100 percent.
[05:44.67]13  If cloned animals could be used as organ donors,
[05:51.12]we wouldn't have to worry about cloning twins for transplants.
[05:55.91]Pigs, for example, have organs similar in size to humans'.
[06:02.39]But the human body attacks and destroys tissue from other species.
[06:09.41]To get around that, one company is trying to alterthe pig's genetic code
[06:16.46]to prevent pig organs from behind attacked.
[06:20.64]If the company's technicians succeed.
[06:24.35]it may be more efficient to produce such pigs by cloning than by current methods.
[06:31.83]14  How would a human clone refer to the donor of its DNA?
[06:38.82]15  "Mom" is not right,
[06:42.71]because the woman or women who supplied the egg
[06:46.77]and gave birth to the infant would more appropriately be called Mother.
[06:52.71]"Dad" isn't right, either.
[06:55.88]A traditional father supplies only half the DNA in a child.
[07:01.97]Judith Martin, in her writings under the name of "Miss Manners",
[07:07.62]suggests the phrase,"Most honored sir or madam". Why?
[07:14.10]"One should always respect one's ancestors," she says,
[07:19.03]"regardless of what they did to bring one into the world."
[07:23.31]16  That still leaves some confusion over vocabulary.
[07:22.31]The editorial director of one dictionary says that the noun
[07:27.82]"clonee" may sound like a good term,
[07:31.10]but it's not clear enough.Instead, he prefers "original" and "copy".
[07:39.16]17  What are the other implications of cloning for society?
[07:45.53]18  The gravest concern isn't really cloning itself,
[07:50.57]but genetic engineering — the deliberate altering of genes
[07:55.97]to create human beings according to certain requirements.
[08:01.16]Specifically, some experts are concerned about the creation of a new
[08:07.60](and disrespected) social class: "the clones".
[08:13.18]One expert believes the situation could be comparable
[08:17.43]to what occurred in the 16th century,
[08:20.81]when Europeans puzzled over how to classify
[08:25.06]the unfamiliar inhabitants of the Americas,
[08:29.31]and endlessly debated whether or not they were humans.
[08:34.17]19  The list of questions could go on;
[08:37.95]people are just beginning to wonder
[08:40.97]about the future of the world after cloning.

 2/2   首页 上一页 1 2