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
1-deoxy-4-oxopeganine
abdic
absolute equivalent
all-risk
anti-communism
arbours
Atriopeptins
Bacillus hemolyticus
be no exertion to
be on parole
bicuspis
bin it
Black Volta, R.(Volta Noire)
brothuh
camber of a ship
cancelled structure
capidity of circulation of money
Chrysanthemum balsamita
clean off the balance outstanding
Cobdenism
comfort woman
contract of cargo transport on water
cross-examiner
depth of mole
Devils Hole
diacetemia
Diesel skidder
donkey-rides
dotted-dashed
dovetailed housing joint
Edward VII
eriophylla
eucalyptus calophyllas
FCAF
fenethacarb
front-lawn
gambrel roofs
Garcinia morella Desv.
gastrorrhexis
general revenue sharing system
go one's death up on
go over something
greater spearwort
guiliano
hambargh
hard-tube pulser
height-area curve
Henoko
herbily
hexagonal scalenohedral (crystal) class
instrumental action
ketophosphonate
Leviglianite
Lindera villipes
local particle reynolds number
low-voltage distribution system
Martian soil
multiple ship release dates
navigational countermeasure
nervus sympathicus
neutron energy grouping method
Oahe Dam
on-line qc
oncostman
organic fibre reinforced composite
Palme
pocket the difference
positron annihilation radiation
potato culture
public offering prospectus
quarter vessel
rail weld seam shearing machine
redressed
rope creases
sample for chemical analysis
scl-
Seasat scatterometer
security loan
single-shaft turbo-set
sinking open caisson by injected air curtain
solenoid with manual emergency control
sound cement
sound-field
source listing file
Spectrobid
spherical roller thrust bearing
strapped into
strategic arsenal
streptocide
strong acid tower
Sīyunī
tallying fee
tapered plate
the wild
there's nothing for it
time-driven
Treatise of Human Nature
tyre engraving
upper squama
verveines
Vilcanota, Cord.de
xeromorphic vegetition