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SSS 2009-04-27

时间:2010-05-17 08:13来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.


April 25th was World Malaria1 Day. The mosquito-borne disease is still one of the biggest killers3 in developing countries with a death toll4 of a million each year. But there’s an international push for a multi-front war on malaria, ranging from cheap and effective bed netting to the development of a vaccine5. The Gates Foundation has bet on vaccines6, but is also funding less conventional scientific approaches.


For example, a scientist at Colorado State University is working on making human blood a mosquito killer2. Some drugs already distributed in the developing world to combat parasites8 such as hookworm are also toxic9 to the malaria-transmitting Anopheles mosquito. The mosquito bites, and the drug in the blood kills it. Researchers are investigating how this approach could be applied10 and expanded.


Another team from the University of Washington discovered that the malaria parasite7 in Asia outsmarts drugs and develops resistance much more quickly than in other parts of the world. They’ve been investigating the mechanism11 of action to be able to figure out a way to block that resistance.


There is hope: in recent years, the Maldives, Tunisia and the United Arab Emirates have eliminated malaria.


Thanks for the minute. For Scientific American's 60-Second Science. I'm Cynthia Graber.
 


点击收听单词发音收听单词发音  

1 malaria B2xyb     
n.疟疾
参考例句:
  • He had frequent attacks of malaria.他常患疟疾。
  • Malaria is a kind of serious malady.疟疾是一种严重的疾病。
2 killer rpLziK     
n.杀人者,杀人犯,杀手,屠杀者
参考例句:
  • Heart attacks have become Britain's No.1 killer disease.心脏病已成为英国的头号致命疾病。
  • The bulk of the evidence points to him as her killer.大量证据证明是他杀死她的。
3 killers c1a8ff788475e2c3424ec8d3f91dd856     
凶手( killer的名词复数 ); 消灭…者; 致命物; 极难的事
参考例句:
  • He remained steadfast in his determination to bring the killers to justice. 他要将杀人凶手绳之以法的决心一直没有动摇。
  • They were professional killers who did in John. 杀死约翰的这些人是职业杀手。
4 toll LJpzo     
n.过路(桥)费;损失,伤亡人数;v.敲(钟)
参考例句:
  • The hailstone took a heavy toll of the crops in our village last night.昨晚那场冰雹损坏了我们村的庄稼。
  • The war took a heavy toll of human life.这次战争夺去了许多人的生命。
5 vaccine Ki1wv     
n.牛痘苗,疫苗;adj.牛痘的,疫苗的
参考例句:
  • The polio vaccine has saved millions of lives.脊髓灰质炎疫苗挽救了数以百万计的生命。
  • She takes a vaccine against influenza every fall.她每年秋季接种流感疫苗。
6 vaccines c9bb57973a82c1e95c7cd0f4988a1ded     
疫苗,痘苗( vaccine的名词复数 )
参考例句:
  • His team are at the forefront of scientific research into vaccines. 他的小组处于疫苗科研的最前沿。
  • The vaccines were kept cool in refrigerators. 疫苗放在冰箱中冷藏。
7 parasite U4lzN     
n.寄生虫;寄生菌;食客
参考例句:
  • The lazy man was a parasite on his family.那懒汉是家里的寄生虫。
  • I don't want to be a parasite.I must earn my own way in life.我不想做寄生虫,我要自己养活自己。
8 parasites a8076647ef34cfbbf9d3cb418df78a08     
寄生物( parasite的名词复数 ); 靠他人为生的人; 诸虫
参考例句:
  • These symptoms may be referable to virus infection rather than parasites. 这些症状也许是由病毒感染引起的,而与寄生虫无关。
  • Kangaroos harbor a vast range of parasites. 袋鼠身上有各种各样的寄生虫。
9 toxic inSwc     
adj.有毒的,因中毒引起的
参考例句:
  • The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
  • There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。
10 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
11 mechanism zCWxr     
n.机械装置;机构,结构
参考例句:
  • The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
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