时间:2019-01-06 作者:英语课 分类:农业与发展


英语课

DEVELOPMENT REPORT - World Population by 2050
By Jill Moss 1


Broadcast: Monday, August 30, 2004


This is Gwen Outen with the VOA Special English Development Report.


New research shows that Earth will have more than nine thousand million people by two thousand fifty. The world population is currently 2 estimated at six point four thousand million.


The research is from the Population Reference 3 Bureau, a private group based in Washington. It says most growth will take place in developing countries in Africa and western Asia.


India is expected to pass China as the world's most populated nation. By the middle of the century, the report says, India will have over one and one-half thousand million citizens, an increase of fifty percent.


China currently has one point three thousand million people. The Population Reference Bureau says the population should increase about ten percent by two thousand fifty.


Most industrial nations will see a drop in their populations. The only big exception is expected to be the United States. The report says the United States will remain the third biggest nation. The population is close to three hundred million now. It is expected to reach four hundred twenty million. The report says this will be because of immigration and low death rates among babies.


Between now and two thousand fifty, Niger is expected to be the fastest growing country. The biggest decrease is expected in Bulgaria.


The study is based on information from governments and the United Nations. Researcher Carl Haub wrote the report. He examined infant death rates, life expectancy 4, birth rates and the age structure of nations. The study also considered family planning use and, for the first time, rates of AIDS.


Mister Haub says most growth will take place in countries with young populations and traditionally large families. He points to Nigeria and Japan as two nations that are moving in opposite directions in terms of population.


In Nigeria, almost half the people are under the age of fifteen. Few are over sixty-five. Nigerian women generally give birth about six times during their lives. By comparison, the average Japanese woman has one child. And today about twenty percent of Japanese are over the age of sixty-five.


Mister Haub expects the Japanese population to decrease by twenty percent. He estimates that the population of Nigeria will increase by more than one hundred twenty percent by the middle of the century.


This VOA Special English Development Report was written by Jill Moss. This is Gwen Outen.



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。
adv.通常地,普遍地,当前
  • Currently it is not possible to reconcile this conflicting evidence.当前还未有可能去解释这一矛盾的例证。
  • Our contracts are currently under review.我们的合同正在复查。
n.提到,说到,暗示,查看,查阅
  • We spent days going through all related reference material.我们花了好多天功夫查阅所有有关的参考资料。
  • I like to have my reference books within my reach.我喜欢把参考书放到伸手可取的地方。
n.期望,预期,(根据概率统计求得)预期数额
  • Japanese people have a very high life expectancy.日本人的平均寿命非常长。
  • The atomosphere of tense expectancy sobered everyone.这种期望的紧张气氛使每个人变得严肃起来。
学英语单词
aerial algae
antiwear quality
avidin peroxidase complex
base address field
bathyergidaes
belt molding
beltlines
biocular
blade rim
brehm
C. R. T. C.
cell inspection lamp
Celtic Wicca
chinese dish
colo(u)r positive
contents retrieval
contrast trans function
corporate power
deanonymize
degos' syndrome(malignant atrophic papulosis)
dietetic albuminuria
dimensionless variable
direct-arc melting furnace
division of land property
Ecclus
electronic metronome
Eleusine indica
elimanating pests and preventing disease
equipment power
excist
fissure water filling deposit
forced-air-cooled
fractional error
Freelton
Geranium nepalense
globe joint
god-mamma
gold medals
harmful pitch
incubation
Indo Chinese
inference control
internetworkings
isobutydeoxvadenosine
jerkins
laccoptera nepalensis
limitation of a right
linum maritinum
local noon
locomotor ataxias
longitudinal-oscillation
made-to-order
meat ant
melongene
metremia
midshipman
non-permanent strain
number check
numeric code element set
once-shining
opinion of independent account ants
oscillation wavelength
ovarian tumor
paint layer
Plenty Bay of
posteromedian
postoral ring
pultaceous angina
pyatt
quaffles
realizable
redundant information theory
relaced
scienfists
self-tone
severe rugged environment
share in company
shawangunk
Siderosphaera
single twisted netting twine
slosh
stymies
sychnodymite
sylor
take the mike out of
Taounate
Theiler, Max
three days of grace
transduction
tripteroides (rachionotomyia) aranoides
truing of grinding wheel
truncator
Turloc
ultimate heat sink basin
unit rainfall
variable orifice desuperheater
vinalhaven
vittorino
wason selection task
working roll
Yunus Emre
zing up