[化] 聚乙烯咔唑

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(124) / 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(128) / 评论(0) 分类 2018年NPR美国国家公共电台2月

Recycling Plastics When plastic containers are recycled, they are first cleaned, then ground into tiny pellets and put into a flotation tank. This separates out the various plastic resins from other waste material. Once they are separated out, the pl

发表于:2018-12-27 / 阅读(130) / 评论(0) 分类 英语时差8,16

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(127) / 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(137) / 评论(0) 分类 听歌学英语

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(145) / 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(144) / 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(132) / 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(130) / 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(143) / 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(128) / 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(117) / 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(151) / 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(239) / 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(131) / 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(153) / 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(126) / 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(136) / 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(142) / 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(119) / 评论(0) 分类 探索与发现2012年
学英语单词
abnormal corrosion
acetylacetonates
adult learning
and a bit over
aphrophora intermedia
applagin
Ascope
Asprieres
asset - backed securities
attenuation process
baboonery
baraka
be a great one for
bedrule
benzopyrazine
boutet
brassinosteroid
c language
caries atonica
chaetoceros laevis
chafe at the bit
chloroethylene poisoning
Chongja
comes up against
condylar element
conworld
coped
craane
cucumerinum
D. & Cl.
depar
discrediteth
Dvoretzky's theorem
escrow letter of credit
ethyl number
exchange of needed goods
excitation index
fabricless
farth
free transfer
Geisslertube
geostationary operational environmental satellite
governmentalism
Gyrwas
half cone
heritable agency
high energy feed
howats
hydroquinonephthaline
INCREF
inogenous
labyrinth packing edge
large run
limited mutual solubility
linear dynamic pinch experiment
long word boundary
masseter reflex
motion coefficient
mushroom-head rivet
nosedrops
nuclear hardening
nude sculpture
omari
option name
output power of runner
over-sprung
oxygen bottom blown converter steel making
pampsychism
paris principles
periodic sequence
Phoenix hanceana
photocoagulato
plead for
Ralls County
real time impact calculation
remineralising
remote probing techniques
Ross ERP
rubidium peroxoniobate
running suit
s.pyogenes
Sangowo
service elevator
soucek
space jurisdiction
squash jacket
stethoscopically
stone massage
storming party
sulphidisation
surface light source
T/E (tables of equipment)
team-talk
terminated (qualifier)
to peace
transires
Trisotropis dermopterus
true aryl nitro-compound
virtual consultation
white sale
Xeliminator
zirconium oxide coating