[化] 十氢咔唑; 十氢化氮芴

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(67) / 评论(0) 分类 探索与发现2012年

SARAH MCCAMMON, HOST: The indie rock band Pedro the Lion is known for its sometimes dreary lyrics that take on internal conflict often filled with religious angst. (SOUNDBITE OF SONG, THE FLEECING) PEDRO THE LION: (Singing) Who shall I blame for this

发表于:2018-12-17 / 阅读(73) / 评论(0) 分类 2018年NPR美国国家公共电台2月

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

Hey 嘿 Beautiful, beautiful, beautiful, beautiful angel 美丽动人优雅纯洁的天使 Love your imperfections, every angle 连你每个不完美的角度都喜欢 Tomorrow comes and goes before you know 时光飞逝你不曾知晓 So I just had

发表于:2019-01-03 / 阅读(82) / 评论(0) 分类 听歌学英语

By Scott Bobb Johannesburg 03 January 2007 South Africa is attending its first meeting of the U.N. Security Council as a one of its new non-permanent members. The government says Foreign Minister Nkosazana Dlamini-Zuma is going to New York for a Cou

发表于:2019-01-11 / 阅读(82) / 评论(0) 分类 2007年VOA标准英语(一月)

Locals in Uganda are lauding a construction project financed by China which is creating the East African country's largest hydroelectric power plant. The 600-megawatt (MW) Karuma Hydroelectric Power Plant is located at the mid-western district of Kir

发表于:2019-01-19 / 阅读(150) / 评论(0) 分类 2018CRI中国国际广播电台

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(76) / 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(83) / 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(90) / 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(63) / 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(63) / 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(96) / 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(59) / 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(72) / 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(58) / 评论(0) 分类 探索与发现2012年

By Ben Gilbert Baghdad 18 January 2006 Gunmen killed 10 guards and kidnapped an African engineer in an attack on a private security convoy in Baghdad, Wednesday. The kidnapping comes less than one day

发表于:2019-02-01 / 阅读(126) / 评论(0) 分类 2006年VOA标准英语(一月)
学英语单词
a moleson (switzerland)
abducting
abu-laban
Acalypha indica
actel
affective involvement
all clued up
amphetamine psychosis
anticipator
armistice pact
ataractics
atto-lux
automatic-control stability
base dissociation constant
basic exchange diskette
battles of guadalcanal
beach goldenrod
beam suppression
binocular single vision
boiling bag
broomies
cardiac valvular chondrification
Carex subtumida
caveology
Cheleiros
classification service
color pyramid
combined diesel on gas turbine (codog)
coratian
dedusting system
degraded relay channel
dichlorotoluene
distribution curve of pulse amplitude
electrocircuit
enterprise executive
epileptic dementia
Erycibe hainanensis
even-carbon fatty acid
file transfer procedure
fisa
fluorinated polyester rubber
forced lubrication pump
geidel
get up to speed
giant jet
go it baldheaded
holshouser
horse racings
humosite
incisurae semilunaris
inhaling method
intestinal peptidase
Inverness cloak, Inverness coat
issue bank
jaroslavite (yaroslavite)
Little Traverse Bay
louviere
marabh
marine biocycle
MWP
nephroptosia
nonpagable region
off-whiter
offer subject to goods being unsold
oversize or under size parts
pakzaban
parlatoria crotonis
passing-note
pillar of the state
prochoanitic
Provie
pulmonary aponeurosis
radio-active decay
railway technics
re-inject
receiving gauge
redhanded
reflector flood
research information service
rgb beam splitter
row-slave
satellite thermal vacuum test
serrations
sextant positioning
small-amplitude-slosh liquid dynamics
soul-sleeper
split air conditioning system
statum
stemonitopsis hyperopta
stock turn
terminated two-port
transship entry
trestolone acetate
trichalgia
undershirt under vest
uneme
uninvaded
United Nations Economic and Social Council
us-like
vibration excited by truck jumping from threshold on deck
wet ketone accumulator
xeromrphy