时间:2019-01-12 作者:英语课 分类:2010年VOA慢速英语(四)月


英语课

This is the VOA Special English Agriculture Report.


Mangroves are unusual looking trees. They have roots that stand in saltwater and look like cables or ropes laid one on top of another. Mangroves are not just pretty -- they help the environment. But now the first worldwide study warns that one in six of the many different kinds of mangroves could disappear.


As a result of the study, eleven species of mangrove 1 have been placed on the Red List of Threatened Species. The list is kept by the International Union for Conservation of Nature.


The study appeared in the Public Library of Science journal PLoS ONE. Lead author Beth Polidoro works for the Global Marine 2 Species Assessment 3 Unit, based at Old Dominion 4 University in Richmond, Virginia.


The researchers looked at seventy species of mangrove. They found that all mangrove forests on coastlines are under threat from development, logging or other dangers. But the areas in worst danger are on the Atlantic and Pacific coasts of Central America.


The study says mangrove trees provide more than one and a half billion dollars worth of services to ecological 5 systems worldwide. For example, areas with mangrove forests were not damaged as badly by the Indian Ocean tsunami 6 in two thousand four.



Mangroves in Everglades National Park in the state of Florida


Mangrove forests protect land against erosion from wind, water and storms. They capture and store carbon dioxide, so experts say they can help fight climate change. And they serve as nurseries for shrimp 7 and other saltwater organisms.


Beth Polidoro says about eighty percent of the mangrove area in India and Southeast Asia has disappeared within the past sixty years. Indonesia is said to have lost almost half its mangroves forests within the past thirty years.


Burma, also known as Myanmar, has lost many valuable mangrove trees in recent years. In some areas there, monkeys play in the tops of mangroves thirty meters tall and dolphins swim in the waters of mangrove forests.


One of the rarest species of mangrove tree grows in just a few places in East Asia and India. There are estimates that only about two hundred fifty mature trees of that species remain. Beth Polidoro says they may disappear within the next ten years unless action is taken to protect them.


She says the good news in the study is that some species of mangrove can be reforested relatively 8 easily. But others are much more difficult to restart.


And that’s the VOA Special English Agriculture Report, written by Jerilyn Watson and available online at voaspecialenglish.com. I’m Jim Teder.


 



n.(植物)红树,红树林
  • It is the world's largest tidal mangrove forest.它是世界上最大的红树林沼泽地。
  • Many consider this the most beautiful mangrove forest in all Thailand.许多人认为这里是全泰国最美丽的红树林了。
adj.海的;海生的;航海的;海事的;n.水兵
  • Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • When the war broke out,he volunteered for the Marine Corps.战争爆发时,他自愿参加了海军陆战队。
n.评价;评估;对财产的估价,被估定的金额
  • This is a very perceptive assessment of the situation.这是一个对该情况的极富洞察力的评价。
  • What is your assessment of the situation?你对时局的看法如何?
n.统治,管辖,支配权;领土,版图
  • Alexander held dominion over a vast area.亚历山大曾统治过辽阔的地域。
  • In the affluent society,the authorities are hardly forced to justify their dominion.在富裕社会里,当局几乎无需证明其统治之合理。
adj.生态的,生态学的
  • The region has been declared an ecological disaster zone.这个地区已经宣布为生态灾难区。
  • Each animal has its ecological niche.每种动物都有自己的生态位.
n.海啸
  • Powerful quake sparks tsunami warning in Japan.大地震触发了日本的海啸预警。
  • Coastlines all around the Indian Ocean inundated by a huge tsunami.大海啸把印度洋沿岸地区都淹没了。
n.虾,小虾;矮小的人
  • When the shrimp farm is built it will block the stream.一旦养虾场建起来,将会截断这条河流。
  • When it comes to seafood,I like shrimp the best.说到海鲜,我最喜欢虾。
adv.比较...地,相对地
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
学英语单词
a ray of
alienatory
Ammoket
anthomaniac
arteria circumflexa scapulaes
auti-fouling coat
bacul-
basic training
be buried under
cereal food
channel for orders
commaund
corporate gang
crocein scarlet 3b
current-cost accounting
d-va
data aggregate type
deep sea mining vessel
Deutsch-Wagram
discipline of tribunal
donts
downhole water flow regulator
dried whole egg
dye beck
edgar rice burroughss
ERGO-Shell
ethnocinemabography
everything to
fev
final subcircuit
finger baffle
finite population correction factor
flexile
freon chiller unit
Furmanov
genus acacias
grease squirt
heavy gas
high concentration hydrochloric acid treatment
high-voltage testing transformer
homoamino acid
housing gasket
hybrid released translation
Khairabad
knocking on wood.
Lenetran
luzzu
main breadth line
make it clear
matt-finisheds
metacromia
microbooster
microcassette recorder
minimarathons
Mphoengs
musayev
my memory
Nexus One
Nihālpur
oeq
phoenix club
planned distributing
postglacial epoch
prelatize
Privas
rachigrap
reduced system of residues
rethinkable
rsjc
salsolinol
sea-captured streams
second helpings
semi-elastic subgrade
semisimple module
short moderate swell
sialons
smokehouses
solar thermal power plant
sowerbyella pallida
spinalized
Spirochaeta eberthi
stercoraceous vomiting
steroid glycoside
storage list
struggle into
subcutaneous test
subeditor
Tadjena
tegel
terminal buttons
tetragnatha praedonia
Tokary
tom collinss
tools for machine tools
total bacteria count
trace of precipitation
UIML
uninserted
unpavilioned
upgird
visual pass
warehousing charge