秆上生的

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(297) / 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(306) / 评论(0) 分类 探索与发现2012年

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(343) / 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(356) / 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(347) / 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(312) / 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(355) / 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(321) / 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(305) / 评论(0) 分类 探索与发现2012年

The female retires to consider her verdict. Its hard not to feel deflated when even your best isnt good enough. The sun influences the lives in the ocean just as it does on land. Its richest parts are those where waves and currents bring fertilizing

发表于:2019-01-23 / 阅读(311) / 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(395) / 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(340) / 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(390) / 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(334) / 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(348) / 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(359) / 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(318) / 评论(0) 分类 探索与发现2012年

68 世界卫生组织呼吁加强治疗肺结核 DATE=7-16-01 TITLE=DEVELOPMENT REPORT - (1) WHO and (2) Tuberculosis BYLINE=Jill Moss (Start at 01'2

发表于:2019-01-30 / 阅读(873) / 评论(0) 分类 科技之光

Cara Dillon:她出生于1975年,来自一个爱尔兰传统音乐世家。她的声音如此清透美丽而极具风格,让观众们觉得相间恨晚。用这样一句话来形容Cara Dillon不足为过:Cara Dillon是个不寻常的天才! 14岁的时候,Cara Dillon就赢得了全爱尔兰传统歌唱比赛冠军。在开始她自己

发表于:2019-02-04 / 阅读(478) / 评论(0) 分类 音乐咖啡厅

MAPUTO, March 2 (Xinhua) -- The winners of the Mozambican Cup 2012 Liga Muculmana guaranteed on Saturday their qualification into the next phase of the Nelson Mandela Cup after beating Gabarone United from Botswana 1-0. Liga Muculmana, former champio

发表于:2019-02-17 / 阅读(419) / 评论(0) 分类 英语新闻
学英语单词
adhesive capsulitis
agenesis of lung
align reamer
alkalimetries
alkyl acrylte
arbitration award
aristotelia serratas
automatic stereodetection
band pass,bandpass
be on the ground
bipolarisation
built-in reference voltage
Caballonema
chicana
commodities in short supply
complementarymorpheme
concisus
continuous versus intermittent models
cow storm
creeping into
damn and blast
diapositive plate
digraphia
directing effect of group
do-goodism
double entry accounting
dual-sourcing
E-P brake controller
ebrary
ethoxylation
external speech
filing-clerks
framp
frayed edge
fucklings
genus Campanula
glass for sealing
go to Davy Jones locker
gotten in on
grenadas
ground rent receipt
guided missile counter-measure
half-immunoglobulin
hanoch
hematoblastic thrombus
heteropoda pingtungensis
histocultured
hoy
hussaw
hydraulic radius model
Hyocheon
inductive read
inositolphospholipid
integral action needle valve
intravenous regional anesthesia
inversion area
kinetic equilibrium
largamente
larky
magnetic Reynolds number
mcneilly
Mooreton
Muscatians
neckedout
nertera granadense
New Pomerania
Ngarambi
Nucleus habenularis lateralis
overshoot
Ovitemin
palaemon serrifer
peak-power out put
photogrammetry
piston crown ablation
polygon circuit
postharvest physiology
pyridyls
saccharoidal texture
sack races
seayaks
shearing stress due to longitudinal bending moment
six-piecest
slead
SmithStreet
spoke reticle
stalwartize
straight wool
straminellus
sulfations
temperate latitude
thermoelectric manometer
to change
to give the devil his due
tough value
track circuit territory
trading arrangement
triangle antenna
user designation code
v-snap receptor
vibration strength of blade
vibronic spectra
zoom back