氨乙吡唑

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(193) / 评论(0) 分类 探索与发现2012年

[00:09.70]I'd like to welcome Tyler Prince, 让我们欢迎泰勒普林斯 [00:12.06]president of Beta Omega Rho fraternity. Beta Omega Rho兄弟会的会长 [00:19.10]Hey, everyone. 大家好 [00:26.30]I've asked Tyler to come today to talk about a

发表于:2018-12-07 / 阅读(261) / 评论(0) 分类 听电影学英语-大学新生

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(202) / 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(228) / 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(237) / 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(220) / 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(210) / 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(234) / 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(217) / 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(188) / 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(226) / 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(294) / 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(226) / 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(252) / 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(178) / 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(224) / 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(229) / 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(239) / 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(214) / 评论(0) 分类 探索与发现2012年

Who says Santa Claus has to be white? Until now, your iPhone's emoji keyboard did. 谁说圣诞老人一定要是白脸的?现在,你的苹果表情键盘可以实现这一转变。 A new beta release of iOS 8.3, currently available only to softw

发表于:2019-02-06 / 阅读(242) / 评论(0) 分类 阅读空间
学英语单词
a scarf
Achillea alpina
Agaricus campestris
apotheosize
arutyunyan
asbestoslike
atbashes
azoalkane
barnesses
bibliographical reference
bje
bone wax
bone-whites
break of contact
bride-gifts
cadmium succinate
cautionary signal
cephalotetauns
Chinese pea tree
claustrum(claustra)
cluster formation
controllong potentiometer
corpus geniculatum laterale
crest of vestibular
current-carrying conductor
de-industrialization
dumping device
eka-francium
elastic-viscoplastic body
elasticized
elm families
emmantles
epifaunal organism
Eritrichium uncinatum
factorial anova
false alarm number
ferrous metasilicate
field localizer
functional root hair
Gholām Kabūd
Grosse Scheidegg
haploid state
heteroatomic
hot deformation
idle circuit
ikr
infectious cirrhosis
input-output time
instrument luster
internal audit auditing
kilo-joule
lfn
log frequency sweep
low-balled
maximum drive speed
moling
moral diversity
mosepele
Muojärvi
n.z
natural uranium (fuelled) heavy-water reactor
nonconductive
oil treadle
orbitel
outside supplier
ownership of productive means
paduzzi
pantalooning
patchiness
phlegmatous
pool-based
poorly-managed
precums
prediction-realization diagram
processe
production expenditure
proficacious
Radeče
read all data
reupholstering
Ridderkerk
sale book
sexagesimo-quarto
sheepstealers
specialtuning
spilonota lechriaspis meyrick
statistical expert system
streptobacillosis
superharvest
Takatonine
trixylyltin bromide
twin tyres
ultrasonic phacofragmentor
undertake to
unrealistic optimism
upper-arm
vegetation subsystem
vena jugularis communis
vetch management for rice fields
weather sides
white horse nettles
Zschaitz