时间:2019-01-07 作者:英语课 分类:农业与发展


英语课

AGRICULTURE REPORT - Endangered Breeds of Farm Animals
By Mario Ritter


Broadcast: Tuesday, May 25, 2004


This is Steve Ember with the VOA Special English Agriculture Report.


Farm animals supply an estimated thirty percent of all food and agricultural needs. They provide products like milk, meat and eggs. They provide fertilizer to help crops grow. And they help farmers work the land.


But there is concern about the loss of many kinds of farm animals as a result of efforts to create new ones. People began to breed livestock 1 at least twelve thousand years ago. Animals not only provided food and labor 2. Their skin and bones also provided clothes and tools. But people also bred animals to survive local conditions.


Breeders look for farm animals with desirable qualities. Such animals are then used to reproduce, so they pass along these qualities for the future. Competition becomes difficult for animals with qualities that are seen as less desirable. The United Nations Food and Agriculture Organization says more than eight hundred breeds are in danger.


Big farms and modern agriculture often depend on only a few kinds of livestock. These animals have been bred to meet the needs of new technology and production methods.


But older kinds of farm animals can be useful too. They may not be as productive as newer kinds of livestock. Yet, they may remain productive even under severe conditions. The Jamunapari goat of India, for example, produces good milk and meat. But its ability to survive in dry conditions with little food makes it highly valuable in parts of India.


The Taihu pig of China is another example. It does not produce as much meat as some breeds of pig. But, it is able to eat many kinds of food and reproduce more than Western breeds.


The Food and Agriculture Organization publishes a list of farm animals that are in danger of disappearing. The agency calls it the World Watch List for Domestic Animal Diversity. The F.A.O. is leading an effort to collect genetic 3 information from breeds of farm animals around the world. In the United States, the American Livestock Breeds Conservancy gathers information on rare farm animals and seeks to protect them.


Breeding over thousands of years has created genetic diversity among farm animals. Different genes 4 can give animals the ability to survive under more conditions. It can also give them better resistance to disease. But now experts warn that we are losing that genetic diversity. At least four thousand breeds of farm animals have been developed. But some experts say hundreds of breeds have disappeared.


This VOA Special English Agriculture Report was written by Mario Ritter. This is Steve Ember.



n.家畜,牲畜
  • Both men and livestock are flourishing.人畜两旺。
  • The heavy rains and flooding killed scores of livestock.暴雨和大水淹死了许多牲口。
n.劳动,努力,工作,劳工;分娩;vi.劳动,努力,苦干;vt.详细分析;麻烦
  • We are never late in satisfying him for his labor.我们从不延误付给他劳动报酬。
  • He was completely spent after two weeks of hard labor.艰苦劳动两周后,他已经疲惫不堪了。
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.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
学英语单词
.re
allowable inverse voltage
antenna changeover
antiteratogen
arbitration board
audit program design
benefit trust
bridge-breakage-fusion-bridge cycle
Brisbanite
broughten
canvas connecting strip
central store unit
cerophytid
chronic perforating hyperplasia
compact disc-digital audio
counter current braking
counterforted wall
cyclical peak
dbt.
deductible average
denard
Dipterocarpol
double tool cross slide
double-sided mirror
doxologize
Dubrivka
electronic tactical deception
elevating conveyer
en masse conveyor
enjoinments
euthanistic
front sheet metal
FS (file separator)
Grey's Plains
hard strip
hermitship
high temperature dispersing furnace
hours of daylight
hydro-dynamic retarder
ice radar
iffiest
interval zone
knuckle four
Kurakhove
leddy
Leutesdorf
line regulating section
logic-arthmetic unit
lutetium compound
lysigenous intercelluler space
magazinage
malacanthidaes
manual for the handing of patent application
master chuck
mexolide
micadina sonani
mlk
Motu R.
n-line-connected graph
name space modification
naphthionate
napropamid
neckbands
net fish
nonnumerical factor
nuclear safety standard
obligational authority
oil-immersed current transformer
olivine mineral
optical network architecture
organic neurology
polybranch
powens
Price-book ratio
prolinol
prom queen
psoriasis nummularis
random forcing
reactuated
rehabilitators
responsiblity
scale order
sea-boards
securities-on-hold mechanism
sindick
spinoculation
suisham
Sulawesi Tengah, Propinsi
sum of squares
sussing
theme-rhemes
thermo gas chromatography
thoracic vertebra
toxicapathy
transit gauge
truehearts
unenumerated articles
up cutting guillotine shear
victory ceremony
white-metal cappel
wittual
world island