时间:2019-01-13 作者:英语课 分类:2007年VOA标准英语(三月)


英语课

By Paul Sisco
Washington
23 March 2007


U.S. scientists in the United States say they have moved a step closer toward success in the fight against malaria 1, by developing mosquitoes that are resistant 2 to at least one form of the deadly illness.  More on this report from VOA's Paul Sisco, who says caution is always advisable when medical breakthroughs are in the news, and this story is no exception.


 
Malaria is spread by mosquitoes
Scientists at Johns Hopkins University in the United States say they have modified the genes 3 of mosquitoes and developed a strain that appears to be resistant to malaria.


Johns Hopkins researcher Jason Rasgon, puts the problem in context. "Malaria infects over 300 million people per year.  Almost three million people die every year from that.  That's mostly children.  Malaria kills an African child about every 30 seconds, on average.  So these are very devastating 4 … it's a very devastating disease."


 
John Rasgon
There are reasons to be cautious about the implications of Professor Rasgon's work.  His malaria-resistant mosquitoes were fed on malaria-infected mice.  The parasite 5 that causes malaria in humans is different, so it is still uncertain whether or when the laboratory breakthrough can help protect people from the disease.


But experts are optimistic that genetic 6 modification 7 can be a potent 8 weapon in fighting malaria.  Professor Rasgon's genetically 9 modified mosquitoes seem much stronger than those that spread malaria, so there is hope that the non-resistant strain could eventually be wiped out. "If we keep going forward with this, these types of experiments will hopefully, ultimately, one day lead to the release of genetically modified mosquitoes that are unable to transmit the malaria parasite."


There are other important concerns, however, according to Professor Rasgon. "We need to deal with all the social, ethical 10, and legal issues associated with releasing a genetically modified mosquito into the environment.  These social issues are going to take a long time."


Research aimed at defeating malaria continues on a number of fronts, but for now, the Hopkins researchers are one step closer to the goal of developing mosquitoes that cannot transmit malaria to human victims.



n.疟疾
  • 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。
adj.(to)抵抗的,有抵抗力的
  • Many pests are resistant to the insecticide.许多害虫对这种杀虫剂有抵抗力。
  • They imposed their government by force on the resistant population.他们以武力把自己的统治强加在持反抗态度的人民头上。
n.基因( gene的名词复数 )
  • 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
adj.毁灭性的,令人震惊的,强有力的
  • It is the most devastating storm in 20 years.这是20年来破坏性最大的风暴。
  • Affairs do have a devastating effect on marriages.婚外情确实会对婚姻造成毁灭性的影响。
n.寄生虫;寄生菌;食客
  • 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。
adj.遗传的,遗传学的
  • 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。
n.修改,改进,缓和,减轻
  • The law,in its present form,is unjust;it needs modification.现行的法律是不公正的,它需要修改。
  • The design requires considerable modification.这个设计需要作大的修改。
adj.强有力的,有权势的;有效力的
  • The medicine had a potent effect on your disease.这药物对你的病疗效很大。
  • We must account of his potent influence.我们必须考虑他的强有力的影响。
adv.遗传上
  • All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
  • Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
adj.伦理的,道德的,合乎道德的
  • It is necessary to get the youth to have a high ethical concept.必须使青年具有高度的道德观念。
  • It was a debate which aroused fervent ethical arguments.那是一场引发强烈的伦理道德争论的辩论。
学英语单词
absolute zero temperature
addition of failure rates
Aldreth
anorexy
arsonous
arthonia tumidula
backstep welding
basic subroutine reference
bearded seal
Bible-clerk
Bifrost
biochemical degradation
Birch Hills
black clip
bleaching agent I for wool
boom cut
buried wire
businesses-to-businesses
Caltra
carvan
catechol-oxydase
char combustion
cluster fly
communifaking
constant value conrol
cordyceps sinensis (berk) sacc
depaves
divisibleness
Djerba, I.de
exophthalmos-producing
external definition symbol
frankl
frequency response testing
gelled patterning and gilding
hazeless
hexamethyl
hole semi-conductor
human T-cell leukemia virus
hump day
iatrogenic impotence
inclination angle of an orbit
information processing systems
internal beam current
kernel of multi-microprocessor operating system
Kira-gawa
latern (ring)
liquid-saturation curve
long keeping
luster of wood
mailbox name
malleable cast-iron
manganese(iv) hydroxide
mareogram
mask pitch
mesh division
metellis
Middenmeer
mucilago tragacanthae
myeloparalysis
Newaygo County
not know if one is coming or going
nuristans
osyter bed
Pacahuaras, R.
paganised
palette(s)
panentheist
pantomycin
peck and hale
photoefficiency of photocathode
photreceptors
piosity
preamble clause
prioritisings
Purnea
relative growth method
repeating circle
retromandibular
scroll bone
second level interrupt
securities market line
separate body and frame
simke
Sinnamary
spectrohelioscope
squamose structure
St Andrews's cross
starded
sulcus infrapalpebralis
tatkal
team project
tetrachordos
tige
unloaded spring
unsightliest
urodelian
Valdemembra, R.
vehicle actuated signal
wature
wihtig
wild purslanes
with a yawn