音标:[,ki:tәu,trai'æzәul] ;
三唑酮

A hundred years ago, there are one and a half billion people on earth. Now, over six billion crowd our fragile planet. But even so, there are still places barely touched by humanity. This series will take you to the last wildernesses and show you the

发表于:2018-12-03 / 阅读(114) / 评论(0) 分类 探索与发现2012年

The penguins stay when all other creatures have fled because each guards a treasurea single egg rested on the top of its feet and kept warm beneath the downy bulge of its stomach. There is no food and no water for them. And they will not see the sun

发表于:2018-12-27 / 阅读(116) / 评论(0) 分类 探索与发现2012年

By Benjamin Sand Islamabad 26 December 2006 A Pakistani soldier keeps position inside a bunker as he monitors Pakistan-Afghanistan border at Kundi Gar post (16 Dec 2006 photo) Pakistan has announced plans to fence and mine sections of its frontier w

发表于:2019-01-12 / 阅读(165) / 评论(0) 分类 2006年VOA标准英语(十二月)

Pakistanis Tire of Water, Electricity Shortages Pakistans new prime minister, Raja Pervez Ashraf, faces a struggling economy and has said he will make the delivery of electricity a priority, but the nation is tired of constant shortages of water and

发表于:2019-01-13 / 阅读(103) / 评论(0) 分类 VOA标准英语2012年(六月)

St. Peter greeted Justin at the Pearly Gates. St. Peter said, Welcome to heaven. I'm St. Peter. Your name, sir? Justin asked, My name? Don't you know my name? I thought you people knew everything and everyone. St. Peter said, We do. But sometimes new

发表于:2019-01-22 / 阅读(104) / 评论(0) 分类 英文短篇故事(纽约)

They are constantly on the move. New-born calves have to be up and running the day they are born. But the vast herds do not travel alone. Wolves. Packs of them, eight to ten strong, shadow the migration. And they are hungry. Its the newly born calves

发表于:2019-01-23 / 阅读(136) / 评论(0) 分类 探索与发现2012年

But they are hungry and eager to reach their mother whos delayed feeding them on this special day. Now she lures them with the promise of milk, the only food the cubs have known since they were born, deaf and blind beneath the snow some two months ag

发表于:2019-01-23 / 阅读(129) / 评论(0) 分类 探索与发现2012年

Day 10. And the mother has let her cubs a mile from the den. Its time to put them to the test. Theyve grown enormously in confidence, but they dont have their mothers sense of urgency. At last it seems that they are ready for their journey. And they

发表于:2019-01-23 / 阅读(118) / 评论(0) 分类 探索与发现2012年

Midsummer on the tundra and the sun does not set. At these altitudes, the suns rays are glancing and not enough of their energy reaches the ground to enable trees to grow. Youll need to travel five hundred miles south from here before that is possibl

发表于:2019-01-23 / 阅读(120) / 评论(0) 分类 探索与发现2012年

As we travel south, so the suns influence grows stronger. And at 50 degrees of latitude, a radical transformation begins. Summers here are long enough for broadleaf trees to replace conifers. Broadleaves are easier to eat and digest, so now animals c

发表于:2019-01-23 / 阅读(133) / 评论(0) 分类 探索与发现2012年

The advance of the seasons brings constant change. As the suns influence diminishes in the north, so the deciduous forests of America begin to shut down, losing their leaves in preparation for the dark, cold months ahead. One season hands over to ano

发表于:2019-01-23 / 阅读(115) / 评论(0) 分类 探索与发现2012年

The character of the forest changes as we descend, becoming ever darker and damper, favoring different kinds of animals and plants. Less than two percent of the sunlight reaches the floor. But even here there is extraordinary variety. In the Great Is

发表于:2019-01-23 / 阅读(105) / 评论(0) 分类 探索与发现2012年

The strike of a great white shark lasts a mere second. Slowing it down forty times reveals the technique and immense strength of this massive predator. If surprise fails, there will be a chase. The shark is faster on a straight course, but it cant tu

发表于:2019-01-23 / 阅读(228) / 评论(0) 分类 探索与发现2012年

The sun beating down on tropical waters powers the weather systems of the globe. Moisture evaporates from the warming ocean and rises to create great storms. The winds generated out at sea sweep inland across the continents. As they travel across the

发表于:2019-01-23 / 阅读(119) / 评论(0) 分类 探索与发现2012年

Deer are frequent casulties of the harsh winter. And these leopards are not above scavenging from a corpse. African leopards could never survive here. But the Russian cats have thick fur to shied them from the cold. There are only 40 Amur leopards le

发表于:2019-01-23 / 阅读(145) / 评论(0) 分类 探索与发现2012年

Their secret is teamwork. Impala are their favourite prey. They start to hunt and the pack splits up. An aerial viewpoint gives a new insight into their strategy. As the dogs approach their prey, they peel off to take up separate positions around the

发表于:2019-01-23 / 阅读(108) / 评论(0) 分类 探索与发现2012年

The dogs know their prey must come out or drown. Now its a waiting game. The rest of the pack are calling. Theyve made a kill in the forest and this is an invitation to join in the meal. The impala is in luck. A pack this size kills once a day and ev

发表于:2019-01-23 / 阅读(128) / 评论(0) 分类 探索与发现2012年

All across southern Africa, all animals are journeying for the same reason. Buffalo join the great track. Nowhere else on Earth are so many animals on the move for the same urgent purpose. They are all heading for the swamps of the Okavango, a vast i

发表于:2019-01-23 / 阅读(129) / 评论(0) 分类 探索与发现2012年

At the peak of the dry season in the Kalahari, water arrives in the Okavango. It fell as rain a thousand miles away in the highlands of Angola and has taken nearly five months to reach here. The water drives out insects from the parched ground which

发表于:2019-01-23 / 阅读(110) / 评论(0) 分类 探索与发现2012年

By David Gollust State Department 04 September 2007 The United States Tuesday dismissed as a total sham the outline for a new Burmese constitution produced by a national convention assembled by the country's military government. The State Department

发表于:2019-02-05 / 阅读(193) / 评论(0) 分类 2007年VOA标准英语(九月)
学英语单词
3-Diethylamino-propanol
4-Methylumbelliferylphosphate
algorithmic programs
Androsace sarmentosa
avel
bazookier
behavioural approach
Beru Atoll
bishops of rome
Boea swinhoei
brouded
cailliet
constitutional obesity
contact binary star
debt service payments
defrank
delic
delivery path
differentiate into
domestic worker
Duāb, Rūd-i
echylosis
edward lears
electronic tonometer
emergency braking system
enterprise service buses
euph
Ficus bengalensis
finite resource
fishery mothership
fricandels
front time of impulse current
froth at the mouth
grapiest
gravity takeup
Haglund's disease
Helicella
Hemi-Resection
histones
homotransplants
import and export merchant
in a manner of speaking
incorrupt, incorrupted
inter-changeabilities
itzik
Katayama nosophora
knocked all of a heap
lack-wit
law school
lemon-colored
lend-leased
Leucomyelopathy
lingard
logic scope board
madesis
magnetic focused image intensifier
member nations
mercury lactate
microeomputer
movable breakwater
nerrer
nkrumahs
olfactorily
ormandies
out-drive
overswim
pillarets
pine-apple
pinhole imaging
poppy-seed
pratique signal
pre-pregnancies
proliferative stage of endometrium
recovered solvent
rejuvenated orogenic zone
relative sunshine duration
REM sleep
report entry
retort upon sb
Rettger's egg-meat culture-medium
Rubus L.
sediment distribution
sialiss
single phase double insulation hand grinder
single-nucleotide
slow (neutron) reactor
soncy
sporicidin
spring reinforced eye
stigmatic hair
synchiropus altivelis
technical analysis package
tension pulley block
terrestrial station
tracking focus
transit trunk
virtual desktop pool
waldoboro
weak absorption
weak-base anion exchanger
will I , nill ye
word deafnesses