VOA慢速英语 2007 0918a
时间：2019-01-11 作者：英语课 分类：VOA慢速英语2007年（九）月
This is the VOA Special English Agriculture Report.
American beekeeping operations have been hit hard by what scientists call colony collapse 1 disorder 2. Almost half of their worker bees have disappeared during the past season. C.C.D. has also been reported in Israel, Europe and South America. Bees fly away from the hive and never return. Sometimes they are found dead; other times they are never found. Many crops and trees depend on pollination 3 by bees to help them grow.
A new report says a virus may be at least partly responsible for the disorder in honey bee colonies in the United States. This virus is called Israeli acute paralysis 4 virus. It was first identified in Israel in two thousand four.
Ian Lipkin at Columbia University in New York and a team reported the new findings in Science magazine. Doctor Lipkin says the virus may not be the only cause. He says it may work with other causes to produce the collapse disorder.
The team found the virus in colonies with the help of a map of honey bee genes 5 that was published last year. They examined thirty colonies affected 6 by the disorder. They found evidence of the virus in twenty-five of them, and in one healthy colony. The next step is further testing of healthy hives.
The researchers suggested that the United States may have imported the disorder in bees from Australia. They say the bees may carry the virus but not be affected.
The idea is that unlike many American bees, the ability of Australian bees to fight disease has not been hurt by the varroa mite 7. This insect attacks honey bees, which could make the disorder more likely to affect a hive. Australian bee producers reject these suspicions.
And some researchers suspect that bee production in the United States is down mainly because of the weather. Honey bees gather nectar from flowers and trees. The sweet liquid gives them food and material to make honey.
But cold weather this spring in the Midwest reduced the flow of nectar in many flowers. Many bees may have starved. Dry conditions in areas of the country could also be playing a part.
Wayne Esaias is a NASA space agency scientist who keeps bees in his free time. He lives in central Maryland, where he has found that flowers are blooming a month earlier than they did in nineteen seventy. Wayne Esaias is organizing a group of beekeepers to document nectar flow around the country.
And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. I’m Steve Ember
- 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。
- 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。
- The flowers get pollination by insects.这些花通过昆虫授粉。
- Without sufficient pollination,the growth of the corn is stunted.没有得到充足的授粉，谷物的长势就会受阻。
- 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。
- You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因，所以能够活得很长。 来自《简明英汉词典》
- Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
- 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。