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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(237) / 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(237) / 评论(0) 分类 探索与发现2012年

crocodile tears sob story 大家知道,眼泪的英文字就是tears。英文里有一个说法,叫做:crocodile tears。 Crocodile就是鳄鱼。Crocodile tears和中国人常说的

发表于:2019-01-10 / 阅读(373) / 评论(0) 分类 美国习惯用语

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(274) / 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(285) / 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(260) / 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(243) / 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(276) / 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(253) / 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(232) / 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(255) / 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(321) / 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(261) / 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(296) / 评论(0) 分类 探索与发现2012年

This is in Africa rarely seen, a lush water world. Some creatures are completely at home here. These are lechwe, antelope with hooves that splay widely enabling them to move at speed through the water. For others, the change is far less welcome. Babo

发表于:2019-01-23 / 阅读(220) / 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(272) / 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(273) / 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(290) / 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(251) / 评论(0) 分类 探索与发现2012年

我们上次讲了两个由story这个词组成的习惯用语。一个是cock and bull story,意思是虚构不实的托词。另一个是cover story,解释掩盖真相的假话。我们今天还要讲几个带有story这个词的习惯用语。第

发表于:2019-02-18 / 阅读(300) / 评论(0) 分类 美国习惯用语
学英语单词
absorption capacitor
accident case
Ajuricaba
alkyl chloroformate
alphamosaics
amended writ
artifical aging
asphalt roofing
Atenholz
auto linefeed
backpack journalist
ballyhoo artists
barboursville
belt-and-suspenders
bios I
biostudies
blackthorn winter
bleached pulp sewage
bogus folio
bottom fastening bolt
bridging connection
BSMAB
buckell
bukovskyite
calyptridium umbellatums
caryin
caudal keel
Chinese brown sauce
chlorine azide
civic science
conditional likelihood
conductivity for heat
considerable contract
cost consciousness
criterion of service
cyclichthys orbicularis
damages caused by a domestic animal
deep-sea fan
defect density
divide out the costs
document-retrievals
electrical axis of heart
factorial symbol
feel like doing
field excitation
fondos
forest physics
four frequency dilex communication
freight in full
full scantling vessel
get caught up in
gill book
Goldstone particle
hanjar
helicia taiwaniana hemsl.
hot water production
hyperosteosis
imaginary axis
intersected country
interspinales thoracis
inverted pricing
lob-
lowest voltage of a system
Macovane
marriage vow
meterbridge
microtouch
multiple thread worm
neutrography
no-fines
non-reverse-reverting value
official foreign exchange holdings
partial recursive predicate
pickup frame
Piedraiaceae
pulse width modulated A-D converter
pyrogeneous
quasilinear hyperbolic equation
rapid flood passage
Rauzābāgh
return a deposit
rhees
ribbon gage
Roper P.
sale consignment
Sendero Luminoso
serial-paralled
Serrana
small form factor
splinteringly
ST_drink_drinking-alcohol
stabilization of currenct
steady state discharge
string of bit
sub-areas
Subcrural
subsystem programmer
tanfields
uncoupling lever arm
unidirectional ring laser
US Secret Service
voltage-tunable magnetron