时间:2019-01-04 作者:英语课 分类:农业与发展


英语课

AGRICULTURE REPORT - Using Water to Produce Electricity
By Gary Garriott


Broadcast: Tuesday, May 04, 2004


This is the VOA Special English Agriculture Report.


The power of flowing water can be used to produce electricity. This can be done anywhere there is water and a hill for it to flow down rapidly 1.


Micro-hydro systems produce electric power from water. These small water-powered systems can produce up to fifteen kilowatts 2 of electrical power. This is enough to provide electricity for a village of fifty to eighty houses to use to power lights and small motors 3. It does not provide enough power for industrial uses. Micro-hydro systems are important for villages that are near water and do not have electric power.


Before you begin the project, you should make sure that people living near you approve. People protest 4 if there is less water for them to use for their crops or for washing clothes.


Building or buying a micro-hydro system requires planning. First, someone has to estimate 5 the amount of electrical power the falling water can produce. It is a complex 6 process. It is necessary to find out how far the water drops and to measure the amount of water that flows past an area each second. These numbers can show how much electrical power can be produced. Then you can buy or build a micro-hydro system of the right size.


Next you need to decide if falling water needs to flow inside a pipe or can flow freely 7. A long pipe costs more, but the water is easier to control. Even if the water flows freely, it must enter a piece of pipe just before it flows into a machine called a turbine 8. The water flowing through the pipe turns a large wheel in the turbine around. The turbine sends the power to a generator 9 that creates electricity.


Heavy rain can cause a problem for a micro-hydro system. The rain carries grass, leaves and other material into waterways. This can cause the turbine to stop turning. The problem can be prevented by placing steel bars in the pipe before the water flows into the turbine. These steel bars catch the material before it can damage the machine.


People who can use flowing water to produce electricity have a free supply of energy. You can get more information about projects like this from the group Volunteers in Technical Assistance 10. VITA is on the Internet at vita.org.


This VOA Special English Agriculture Report was written by Gary Garriott.



adv.快地,迅速地
  • The company has grown rapidly in the last five years.这家公司近五年来迅速地发展壮大。
  • Ice changes into water rapidly on a hot day.天气炎热的时候,冰很快就化为水。
千瓦( kilowatt的名词复数 )
  • It's about 500 kilowatts per hour on average. 年用电量平均为每小时500千瓦。 来自商贸英语会话
  • We have an emergency-standby electric generator with a capacity of 300 kilowatts. 我们有一台三百千瓦的事故备用发电机。
n.马达,发动机( motor的名词复数 )
  • The United Auto Workers hit the bricks against General Motors. 联合汽车工人工会举行罢工,反对通用汽车公司。 来自《简明英汉词典》
  • The whine of the motors jangled her nerves. 马达的闹声使她的神经受不了。 来自《现代英汉综合大词典》
v.反对,抗议;宣称;n.抗议;宣称
  • I can't pass the matter by without a protest.我不能对此事视而不见,我要提出抗议。
  • We translated his silence as a protest.我们把他的沉默解释为抗议。
n.估计,估量;评价,看法;vt.估计,估量
  • We estimate the cost to be five thousand dollars.我们估计费用为5000美元。
  • The lowest estimate would put the worth of the jewel at $200.按最低的评估这块宝石也值200美元。
adj.复杂的,合成的,综合的;n.联合体
  • What he said was too complex for me to understand.他说的太复杂了,我无法了解。
  • Justice is part of the complex machinery of the law.正义是复杂的法律机器的一部分。
adv.自由地,随便地,无拘无束地
  • She was unable to keep back her tears,and wept freely.她抑制不住泪水,痛痛快快地哭了起来。
  • A liquid flows freely and has no fixed shape.液体能自由流动,无固定形态。
n.涡轮机,叶轮机,透平机
  • A disadvantage of the turbine is that it is not reversible.涡轮机的一个缺点就是它不可以反转。
  • Before the air enters the turbine,fuel is sprayed into it.在空气进入涡轮之前,燃料就喷进了。
n.发电机,发生器
  • All the while the giant generator poured out its power.巨大的发电机一刻不停地发出电力。
  • This is an alternating current generator.这是一台交流发电机。
n.援助,帮助
  • She called and called but no one came to her assistance.她叫了又叫,但没有人来帮。
  • He will get the great possible assistance.他将获得尽可能大的帮助。
学英语单词
acid annealing
aleurone cells of endosperm
anoxic pore water
antenna long-wire
Arleux
augmental off-gas system
authorized data list
brought to the table
buffer plate
buried drain
calonectris leucomelas
canister-shot
capacity resistence time constant
chronosequence
coal cassification
coherent processing system parameter
coloured vase
composite depreciation method
constaff
constant current potentiometry
convenien
coroner's court
crushing force
deposition of radioactive dust
dinicotinoylornithine
EFR
Environmental Study Conference
fan-brake
free-thinning
gamma ray dosimeter
H. & S.
haloform
hanged around
haptically
Hartley, Marsden
headiness
hearthwares
hinchcliff
hogling
immunity resistant
insect bar
interspousal
ipsm
Julian Alps
Kven
lead totanate ceramics
Macewen's operation
mental arithmetic
misspender
muldaur
multienzyme complex
narchinol
national defence economics
national-savings
neighborhood parks
neosurrealists
newton's friction law
North Plains
obad
operation elements
optimal rate of mark up
Oterben
output of systems analysis and design
Pediapred
peer acceptance
pestalotia aucubae hara
potassium carbonate peroxyhydrate
preoptive control
product-mixes
promurit
puristical
pyridoxine hydrochloride
residual-ore deposit
resoundable
revives
room mining
San Salvador
Savona
Sechuana
sederunt
shed the blood of someone
single sweep
soil stratigraphy
soil test
SSI (secondary side inspection)
substrate orientation
sweettalks
take breath away
thyroidism
ticker-tape
toogh
town-hall
trachelomonas pseudobulla
trouble-free
two-byte conversion
vacuum bypass
valley shape factor
vertical slit arc-chute
wagon wheel grain
water-tight regulations
woolner
Yucatan Current