奥巴唑

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(70) / 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(71) / 评论(0) 分类 探索与发现2012年

Azaz Residents Pick Up After Aerial Bombings The residents of Azaz clean up and mourn after Wednesday's deadly bombing by Syrian government warplanes. Azaz had been peaceful in recent months, although forces of the rebel Free Syrian Army have had to

发表于:2019-01-13 / 阅读(103) / 评论(0) 分类 VOA标准英语2012年(八月)

Enviropreneur Seeks to Save the Environment, Empower Community enviropreneur变废为宝,拯救环境 NAIROBI Lorna Rutto, a former banker, is now an enviropreneur - turning plastic waste into furniture and fences. Rutto discusses the challenges face

发表于:2019-01-14 / 阅读(89) / 评论(0) 分类 VOA标准英语2014年(九月)

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(77) / 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(84) / 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(72) / 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(75) / 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(91) / 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(66) / 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(64) / 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(182) / 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(64) / 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(97) / 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(60) / 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(66) / 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(73) / 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(60) / 评论(0) 分类 探索与发现2012年

This is the VOA Special English Development Report. The World Health Organization is using a new combination of drugs to treat human African trypanosomiasis disease, also known as sleeping sickness. The drugs nifurtimox an eflornithine will be given

发表于:2019-01-31 / 阅读(82) / 评论(0) 分类 2010年慢速英语(一)月

BEIJING, Aug. 8 (Xinhua) -- China on Wednesday started to review anti-dumping measures it imposed on chloroprene rubber imported from a Japanese company, the Ministry of Commerce said. The move came after the ministry received complaints that Japan E

发表于:2019-02-05 / 阅读(149) / 评论(0) 分类 英语新闻
学英语单词
a conversation piece
aangs
acceptor binding energy
acrosomal vacuole
alkalireserve
amenorrhea due to uterine lesion
aminopolycanboxylic acid
amyleine
Anastasius II
anglo-canadians
Australian pitcher plant
autarcesiology
be under discussion
bemisia giffardi
bench run
biological effects of marine pollution
blumleins
Caicos
calf-bone
California encephalitis
chromium ion
circular main movement
clot-bird
Coahuila, Estado de
Cobazymase
colour contrast
cuddy board
data handling equipment
Dawbarn's sign
de-Stalinise, destalinised
decries
descending stroke
dialkyl sulfates
double doublet
drawing off
drift spaces
dynamic data area
eat at home
econometric methodology
elastic backbone model
extra value meal
fatty cutting oil
file retention
financial instability
finger URL
five-address instruction
fortin manometer
Frankes
freaklitters
G.I. Joe
gantry type milling machine
General Tariff Rate
glycolyze
graphic arts chromatology
half-reaction method
height correction
home-theater
i-het
indium hydrosulfide
institution software
intendible
Jesus shop
K-polynomial
karaman
La Toscana
Lunar A
maiden's honesty
multiple copies
Neasden
Noakhali
nonconducive
nonstationary motion
not duest
on-come
organo-halogens
phlebotomus fly
producta
proportional unit of middle finger
radial plane
rate of stellar extinction
reference transition temperature
resin flow model (composite)
ronon
rotz
scratch-hardness tester
single crystal electrode
smsisdsdslses-s
specified sensitivity
starblind
stationward
Subamycin
supraoccipital bone
tempt God
tolub
trachydacite
turbidometric
vacuum press
voltage-invariant base-width
wastepaper baskets
Wh, wh
what's on your mind
wohlwill gold-refining process