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VOA常速英语新闻:科学家寻找对付致命病毒的办法(双语)

Cherie207 于2013-03-27发布 l 已有人浏览
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病毒是奇怪的东西,尽管仍在病毒是否有生命的科学疑问,病毒确实有基本的基因结构,具有生物活性。但它们并不具备细菌那样的内在生殖能力,细菌这样的微小生物一旦感染了人类宿主,就能用自己的DNA复制自我。
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Viruses are strange things. Though there is some scientific question about whether viruses are alive or not, they do have a basic genetic structure that allows them to be biologically active. But they don't have the built-in reproductive capacity of bacteria -- tiny, living organisms which, once they have infected a human host, can make copies of themselves using their own DNA.
病毒是奇怪的东西,尽管仍在病毒是否有生命的科学疑问,病毒确实有基本的基因结构,具有生物活性。但它们并不具备细菌那样的内在生殖能力,细菌这样的微小生物一旦感染了人类宿主,就能用自己的DNA复制自我。

John Connor, a virologist at Boston University in Massachusetts, explains that in order for viruses to reproduce and become a disease threat, they must first hijack the genetic machinery of a living cell:
约翰·康纳是马萨诸塞州波士顿大学的病原体学家,他解释说,病毒要能自我复制并成为疾病威胁,它们必须首先劫持活细胞的遗传机制。

“They’re parasites," said Connor. "They get inside our cells and use a lot of our machinery in order to make extra copies of themselves. And so that poses a really delicate question of how do you destroy the virus without getting yourself.”
“病毒是寄生者,存在于我们细胞内,使用我们大量的机制来进行大量的自我复制。这样就出现了一个微妙的问题,如何在不毁灭我们自身的同时毁灭病毒呢?”

Connor and his colleagues screened thousands of chemical compounds, looking for ones that showed strong antiviral activity.
康纳和同事们观察了数千种化学物质,寻找具有抗病毒活性的那个。

They identified several small molecules that interfere with the replication of a class of pathogens known as NNS viruses, which cause the deadly Marburg and Ebola infections, as well as measles and mumps.
他们发现几种小分子干预一种名叫NNS病毒的病原体,这种病毒能引发致命的马尔堡和埃博拉感染,以及麻疹和腮腺炎。


词汇解释:
1.pathogen n. 病原体;病菌

Compost is not necessarily pathogen-free.
堆肥并不一定需要无病原微生物。

2.reproductive adj. 生殖的;再生的;复制的

Every animal has reproductive organs.
每种动物都有生殖器官。

3.parasite n.寄生虫;食客

The lazy man was a parasite on his family.
那懒汉是家里的寄生虫。

4.antiviral adj. 抗病毒的;抗滤过性病原体的

Interferon is probably the most significant nonspecific antiviral substance.
干扰素可能是最重要的一类非特异性抗病毒物质。

5.measles n. [内科] 麻疹;风疹

Measles ails the little girl.
麻疹使这个小女孩很不舒服。

6.mump n.腮腺炎

Mumps is a children's disease.
腮腺炎是一种儿童疾病。

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