时间:2018-12-07 作者:英语课 分类:VOA2003(上)-健康资讯


英语课

 



Broadcast: January 27, 2003
By Jill Moss 1


This is the VOA Special English Development Report.


Researchers have discovered a simple answer to a huge problem in developing countries. They have found that cholera 2 and other deadly organisms can be removed from drinking water with simple cloth filters2. Pouring water from rivers or lakes through several thicknesses of cloth can trap tiny organisms that contain the cholera bacteria.


Researchers discovered this fact during a three-year study in Bangladesh3. American and Bangladeshi scientists went to sixty-five small villages in a country where cholera is a major health problem. They tested the use of saris as cloth filters. A sari is the traditional clothing worn by most women in Bangladesh.


People in one group of villages used cloth from old saris, folded eight times, as a filter for their drinking water. People in another group of villages used modern nylon4 filters for their water. People in the other villages continued to gather water in traditional ways, without using filters. About forty-four-thousand people were studied in each of the three groups of villages.


Rita Colwell from the University of Maryland at College Park helped lead the study. She said the people in the villages using filters from old saris had the lowest number of cases of cholera. The researchers also found that almost ninety-nine percent of cholera bacteria could be filtered out with the sari cloth. Mizz Colwell said that cloth from old saris worked best because it has been washed repeatedly. She said the space between the threads of the material narrows when the cloth is washed so it traps smaller particles.


Cholera is an intestinal 3 infection caused by bacteria5. It can develop in the body in less than five days. It can quickly lead to severe diarrhea6, vomiting7, and a loss of bodily fluids. Death is possible if treatment is not given quickly. Children under age five are most at risk. In two-thousand-one, the World Health Organization reported almost two-hundred-thousand cases of cholera in fifty-eight countries. About three-thousand people died from the disease.


Cholera spreads quickly in developing countries. People get the disease by drinking water or eating food that contains the bacteria. The disease is most often found in areas where there is unclean water and ineffective human waste removal systems.


1. cholera [5kClErE ] n. 霍乱
2. filters [5fIltE] n. 过滤器
3. Bangladesh [7bB:N^lE5deF] 孟加拉国
4. nylon [5naIlEn] n. 尼龙
5. bacteria [bAk5tIErIE] n. 细菌
6. diarrhea [7daIE5rIE] n. 痢疾,腹泻
7. vomit [5vRmIt] vt.呕吐



1 moss
n.苔,藓,地衣
  • Moss grows on a rock.苔藓生在石头上。
  • He was found asleep on a pillow of leaves and moss.有人看见他枕着树叶和苔藓睡着了。
2 cholera
n.霍乱
  • The cholera outbreak has been contained.霍乱的发生已被控制住了。
  • Cholera spread like wildfire through the camps.霍乱在营地里迅速传播。
3 intestinal
adj.肠的;肠壁;肠道细菌
  • A few other conditions are in high intestinal obstruction. 其它少数情况是高位肠梗阻。 来自辞典例句
  • This complication has occasionally occurred following the use of intestinal antiseptics. 这种并发症偶而发生在使用肠道抗菌剂上。 来自辞典例句
学英语单词
a thinker
aci-
againts
agricultural threshold temperature
Alloza
angle side bracket
arc welded pipe
Brachystemma calycinum
bradar
cab-tyre sheath
calcium bisulfate
candle Power
capacitive voltage divider
Casamance, Rég.de
Central London Railway
chartar
clay treating
cold-box core blower
common baterial blight of bean
creesh
cucumber
degassing of hydrogen
delivery of energy
earth bucket
effective exposure time
eight-team
ELF communication
emergency arrangements
feasible plan
feed water treatment
fight-back
food relationship
forgivable
fundamental duality theorem
Gloria in Excelsis (Deo)
glyoxylate bypass
halenesses
halls
Heteropanax brevipedicellatus
hypercorrected
impervious graphite
inferior anterior
initial orbit
instrumental azimuth
irreducible proof
jarosz
kinematic(al) variables
Kirenskiy Rayon
knights caligate
Laplace station
limitof elasticity in compression
liquid adsorption method
long - chain polymer
man-rad
marshy weeds
medellins
Mercamphoramidum
Microsoft Volume Licensing
microwave circuits
mkis
narc-
nondividing
nonlinear variation
opposite-field
p-base
paint remover
political views
pusher leg
PYDH
rectangular bloom
science and technology forecast
seamuss
secac
self-reports
semihydrogenation
septate parenchyma
set off at score
soil adversity resistance
SOMF
Sprucier
subroutine data area
swills
sympathicotonia
target gland
tea-ho
temperature deformation
temporary stopping
thonolan
three way jack
tmnt
to have an abhorrence of
token rotation timer (trt)
tree work
tricyclopentadienyl-butoxy-thorium
trimis
undivided profit
usatf
veneer peeling lathe
Welsh uncle
wooziest
worked off
zygomaticomaxillalry