VOA慢速英语2009年-Agriculture Report - New Findings About Di

This is the VOA Special English Agriculture Report.

Colony collapse¹ disorder² first struck honey bees in the United States in late two thousand six. Over the next two years, beekeepers lost more than one-third of their honey bees.

Scientists in the United States and other countries have been working to explain the mysterious disappearances³ of bees. Now, a new study suggests that several viruses may act together.
　
A couple in Wilmington, Ohio, look over the honeycombs in their beehives last month

Scientists from the University of Illinois and the United States Department of Agriculture did the study. Their report appeared in the Proceedings⁴ of the National Academy of Sciences.

The team compared bees from affected⁵ colonies with those from healthy colonies. They were looking for differences in gene⁶ expression in the guts⁷ of the bees.

The scientists found that the affected bees had a number of viruses from a group called picorna-like viruses. The infections observed in the bees included Israeli acute paralysis⁸ virus and deformed⁹ wing virus.

Tiny insects likely play a big part in spreading the viruses. Varroa mites¹⁰ have been causing serious problems in bee colonies in the United States since the late nineteen eighties. These mites carry picorna-like viruses.

The viruses appear to harm the bees' ability to use their genetic¹¹ material to produce proteins needed to fight infections. Researcher Reed Johnson, now at the University of Nebraska-Lincoln, says the study suggests that the damaged proteins are unable to respond effectively when attacked.

University of Illinois Professor May Berenbaum says it appears that bees could deal with one or two viruses at the same time, but not three or four.

She says the picorna-like viruses "hijack¹²" the ribosome in cells. Ribosomes are structures in which proteins are made. As a result the ribosome produces only viral proteins.

The professor says ribosome is central to the survival of any organism. If it is compromised, then the bees could not defend themselves against pesticides¹³ or fungal infections or bacteria or poor nutrition.

These have all been identified as possible causes of the collapse disorder. Spanish researchers, for example, recently said they suspected a parasitic¹⁴ fungus¹⁵ which has been found among affected bees in Spain.

Bees add billions of dollars in value to many crops worldwide. For now, beekeepers have been doing their best to try to protect their colonies.

And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. I'm Faith Lapidus.

1 collapse   

vi.累倒；昏倒；倒塌；塌陷

参考例句：

• The country's economy is on the verge of collapse.国家的经济已到了崩溃的边缘。
• The engineer made a complete diagnosis of the bridge's collapse.工程师对桥的倒塌做了一次彻底的调查分析。

2 disorder   

n.紊乱，混乱；骚动，骚乱；疾病，失调

参考例句：

• When returning back,he discovered the room to be in disorder.回家后，他发现屋子里乱七八糟。
• It contained a vast number of letters in great disorder.里面七零八落地装着许多信件。

3 disappearances   

n.消失( disappearance的名词复数 )；丢失；失踪；失踪案

参考例句：

• Most disappearances are the result of the terrorist activity. 大多数的失踪案都是恐怖分子造成的。 来自辞典例句
• The espionage, the betrayals, the arrests, the tortures, the executions, the disappearances will never cease. 间谍活动、叛党卖国、逮捕拷打、处决灭迹，这种事情永远不会完。 来自英汉文学

4 proceedings   

n.进程，过程，议程；诉讼(程序)；公报

参考例句：

• He was released on bail pending committal proceedings. 他交保获释正在候审。
• to initiate legal proceedings against sb 对某人提起诉讼

5 affected   

adj.不自然的，假装的

参考例句：

• She showed an affected interest in our subject.她假装对我们的课题感到兴趣。
• His manners are affected.他的态度不自然。

6 gene   

n.遗传因子，基因

参考例句：

• A single gene may have many effects.单一基因可能具有很多种效应。
• The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。

7 guts   

v.狼吞虎咽，贪婪地吃，飞碟游戏（比赛双方每组5人，相距15码，互相掷接飞碟）；毁坏（建筑物等）的内部( gut的第三人称单数 )；取出…的内脏n.勇气( gut的名词复数 )；内脏；消化道的下段；肠

参考例句：

• I'll only cook fish if the guts have been removed. 鱼若已收拾干净，我只需烧一下即可。
• Barbara hasn't got the guts to leave her mother. 巴巴拉没有勇气离开她妈妈。 来自《简明英汉词典》

8 paralysis   

n.麻痹(症)；瘫痪(症)

参考例句：

• The paralysis affects his right leg and he can only walk with difficulty.他右腿瘫痪步履维艰。
• The paralysis affects his right leg and he can only walk with difficulty.他右腿瘫痪步履维艰。

9 deformed   

adj.畸形的；变形的；丑的，破相了的

参考例句：

• He was born with a deformed right leg.他出生时右腿畸形。
• His body was deformed by leprosy.他的身体因为麻风病变形了。

10 mites   

n.（尤指令人怜悯的）小孩( mite的名词复数 )；一点点；一文钱；螨

参考例句：

• The only discovered animals are water bears, mites, microscopic rotifers. 能够发现的动物只有海蜘蛛、螨和微小的轮虫。 来自辞典例句
• Mites are frequently found on eggs. 螨会经常出现在蛋上。 来自辞典例句

11 genetic   

adj.遗传的，遗传学的

参考例句：

• It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
• Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。

12 hijack   

v.劫持，劫机，拦路抢劫

参考例句：

• Most countries refuse to give sanctuary to people who hijack aeroplanes.大多数国家拒绝对劫机者提供庇护。
• The hijack take place just after the plane take off.劫持是飞机刚起飞后发生的。

13 pesticides   

n.杀虫剂( pesticide的名词复数 )；除害药物

参考例句：

• vegetables grown without the use of pesticides 未用杀虫剂种植的蔬菜
• There is a lot of concern over the amount of herbicides and pesticides used in farming. 人们对农业上灭草剂和杀虫剂的用量非常担忧。 来自《简明英汉词典》

14 parasitic   

adj.寄生的

参考例句：

• Will global warming mean the spread of tropical parasitic diseases?全球变暖是否意味着热带寄生虫病会蔓延呢？
• By definition,this way of life is parasitic.从其含义来说，这是种寄生虫的生活方式。

15 fungus   

n.真菌，真菌类植物

参考例句：

• Mushrooms are a type of fungus.蘑菇是一种真菌。
• This fungus can just be detected by the unaided eye.这种真菌只用肉眼就能检查出。