聚氨基三唑

1. The Souris River appears to be starting a slow decline at Minot, North Dakota. Efforts to hold off further flood damage are successful so far. The forecasters warn Minot won't be clear of danger until the water falls significantly later this week.

发表于:2018-12-15 / 阅读(118) / 评论(0) 分类 美联社新闻一分钟2011(六月)

Interviewer: I understand you're interested in holistic medicine. Can you explain what holistic medicine is? Vivienne: OK. Holistic medicine, um, takes into consideration the whole of the person. Now

发表于:2018-12-26 / 阅读(127) / 评论(0) 分类 中级英语听力

Interviewer: I understand you're interested in holistic medicine. Can you explain what holistic medicine is? Vivienne: OK. Holistic medicine, um, takes into consideration the whole of the person. Now what this means in, in most holistic systems is re

发表于:2018-12-27 / 阅读(83) / 评论(0) 分类 北外英语中级听力

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(75) / 评论(0) 分类 探索与发现2012年

By Brian Padden Washington 15 April 2008 The rising cost of food has triggered riots in a number of countries in recent weeks. Economic policy makers warn that the inflationary effect could push millions back into poverty. And aid organizations are c

发表于:2019-01-11 / 阅读(57) / 评论(0) 分类 VOA常速英语2008年(四月)

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(125) / 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(67) / 评论(0) 分类 VOA标准英语2012年(六月)

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(81) / 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(88) / 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(76) / 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(76) / 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(95) / 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(70) / 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(66) / 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(66) / 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(99) / 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(61) / 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(70) / 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(75) / 评论(0) 分类 探索与发现2012年

By Mil Arcega Washington 28 April 2008 The World Food Program warns that rising food prices could turn into a global crisis unless the world acts quickly. The U.N. food agency has issued an urgent appeal to the international community for immediate a

发表于:2019-01-31 / 阅读(55) / 评论(0) 分类 VOA常速英语2008年(四月)
学英语单词
academic debate
AFOLs
aorticorenal ganglion
application response measurement
average deviation about the mean
B movies
berties
buffering rubber ring
caesalpinioideaes
citlaltepetl (zitlaltepec)
conus chiangi
crinnin
date of contract
degree of dependence on imports
denuclearizations
direct frequency modulation
distance charged for
double dating
dramaturgists
duke waynes
dusky grouse
eczema tyloticum
effective payment clause
electrosleep
emergency air bank
environmental complex
envisager
etains
felis catuss
femap
fertile node
first generation image
flannelled
form of enterprise
full journal bearing
garden nasturtiums
gas temperature ranges
Geeville
glucobrassicins
GM_farther-farthest-or-further-furthest
gulacave
gum mastic
helical configuration
Holomastigaceae
hot-wire oscillograph
imparters
international regime
Jabukovac
kappa light chain
kempsters
king pawns
latest node time
laybacks
low-low theory of language
lygophilia
millersons
miniatura
mitsuba
mulherns
multicolor printer
multiple tubing wellhead
navicula sp.
navigation kerosene
nominal shock pulse
Numakuma
Palbusi
pancytosis
patresfamilias
pericholagitis
phaeofacin
pour out vials of one's wrath on
preferred provider
preventricular stenosis
puffer train
put the clock on
receptive spot
Rhenish architecture
ricolettaite
ring off
roundabout way
rudyard kiplings
satisfactionist
Sawākin
semiconductor tetrode
slogos
souvenir sheet
spherical divergence
st. bees hd.
sugar plums
System case
technical form
tescom
totol blindness
track maintenance section
Trgovište
tube model
two-pointer
unlockable
valvular heart diseases
vemynous
vertical conveyor
Vienna bread