[化] 夹竹桃苷; 欧莲素; 齐墩果苷
[医] 欧夹竹桃甙

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

Long long ago there ruled a king by name Nazar. He ruled the kingdom in peace and prosperity. He also led a peaceful life. But he had a problem. Prince Hussein, his son was not willing to marry. Many maidens and princesses tried to marry the prince w

发表于:2018-12-12 / 阅读(137) / 评论(0) 分类 一千零一夜英文故事

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

Shirin Ebadi, born in 1947, is an Iranian lawyer and human rights activist. She is most famous for winning the 2003 Nobel Peace Prize. The panel of judges praised her significant and pioneering efforts for democracy and human rights, especially women

发表于:2019-01-01 / 阅读(160) / 评论(0) 分类 各国名人英文介绍

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(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(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 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(98) / 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

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(50) / 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
学英语单词
a poop
afflicted child
amphitropous ovule
areciboes
assisted suicides
autonomous word
bankman
benzylate
bladed disk
caesalpin
campus-based
Carissa schimperi
casava
circular washing machine
class B push-pull
cod liver oil
Cotegipe
coupling interval
danger tables
deoxypentosenucleic acid
diacylglyceral
direct assignment operator
dispred
do a great deal of good
double-row compressor
duback
Economic and Social Council commission
Edward II
electron effective mass
emergency depreciation
entry point of bootstrap read routine
extraneous income
fenways
field training exercise
Fimarbi
fire workperiod
fire-smoke detection
fluoroprotactinate
fnabs
forethinking
four-quadrant multiplier
Gojam
grand-canonical partition function
Harakiri swap
harpoes
heat-treatment zone
hybrid microcircuit lead
Internation Law Comission
judgematic
kiln turner
macroexamination
measured temperature
mentee
mildbase
mooches
Mork and Mindy
n-valued
native plasma
Neoharriotta pinnata
neutron radiation damage
nisha
pemphigus srphiliticus
phenolic aldehyde acid-proof varnish
plesio-
pneumatic knockout
Porosphaera
positive edges
pousto
prior to seeding
Proetz's displacement
proto-capitalist
protochondocuranrine
purifaction
quera
raceway parallelism with face
rack housing
real-time clock count word
Saccharomycetales
Senecio kumaonensis
separately stowed
servo driven positioner
simplex periodontitis
skimmer cyclone
space out the difference in the prices
spirketting plate
square sum of residuals
stbd
stool stock
stormy waves
Straussler
strawy formyard manure
symlinked
tank liquor
teacher's desk
thermal acoustic oscillation
to exercise
torpedoplane
Trojan group
unspotted
wists
witwatersrand system
Zantiébougou