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新浪首页 > 教育天地 > 基因改造,食不甘味?(2)

(GM)Food for Thought(II)
http://www.sina.com.cn 2002/05/09 09:24  空中美语

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  课文内容

  Since emerging into the public consciousness, genetically modified foods have been at the center of vehement controversy. Some people extoll GM foods’tremendous potential for good. Others warn of the catastrophic nature of their possible side effects.

  Proponents of genetically modified foods paint a rosy picture of deserts turned to arable land; starving millions fed with vitamin augmented foods; and crops altered to be resistant to weeds and pests. Biotechnology, they say, can also be used to provide a kaleidoscope of other products ranging from cleaner plastics to consumable vaccines.

  Critics counter this optimism by pointing out that biotechnology circumvents all the safeguards that nature has putsintosplace to avoid disaster. GM technology causes drastic, immediate, and irreversible evolutionary developments whose results are unpredictable.

  Along with the introduction of GM foods comes a number of questions. Will pest-resistant genes in crops spread to surrounding vegetation and create super weeds that require more toxic chemicals to eradicate? Will people with food allergies be able to realistically monitor their diets? Will these alien genes harm the fragile ecosystem upon which we all depend?

  Genetic modification is simply the utilization of DNA technology to transfer the genetic traits of one species to another. It is the lack of information regarding its potential effects, however, that leave many wondering if GM foods are a miracle or a monster.

  ---by Randy Peters

基因改造,食不甘味?(2)

  翻译

  自从转基因食物逐渐出现在公众的意识中,它们就成为了激烈争论的焦点。有些人赞赏转基因事物的极大潜力。另一些人告诫说它们可能产生副作用,具有毁灭性的实质。

  转基因食物的支持者描绘出一幅美好的画面,沙漠变良田;无数挨饿的人获得含有大量维生素的食物;作物变得抵抗杂草和害虫。他们说,生物科技也能生产千变万化的其他产品,从较纯净的塑料制品到口服疫苗。

  批评者指出生物科技阻碍了大自然为了避免灾害而采取的所有保护措施,从而反驳了这种乐观的看法。转基因科技导致了彻底、直接且不可逆转的进化发展,而这些发展的结果是不可预知的。

  转基因食物的引进带来了一系列的问题。作物中抵抗害虫的基因会不会传播给周围的植物,从而长出需要更毒的农药才能根除的超级杂草?食物过敏的人是否能确实监控他们的饮食?这些异种基因会不会破坏我们赖以生存的、脆弱的生态系统?

  转基因指是利用DNA(脱氧核糖核酸)技术,将某一物种的基因特征转移给另一物种。然而,由于缺乏足够的关于转基因食物潜在影响的信息,不免使许多人怀疑,转基因食物究竟是个奇迹,还是个恶魔。




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空中美语 专栏

Annotation

1. vehement a.激烈的

2. augmented a.增加的

3. circumvent v.阻遏

4. eradicate v.根除


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