坐标[系]

by Jason Marshall Theres been a lot of talk about 2D versus 3D in the television and movie industries lately. But what exactly does one, two, and three-dimensionality really meanboth in the everyday world and in math? Well, prepare to have your curio

发表于:2018-12-07 / 阅读(132) / 评论(0) 分类 数学英语

A new study has found that the Arctic's iconic polar bears are finding it harder to hunt for food due to melting sea ice caused by climate change, putting the species at a growing risk of extinction. Researchers from the United States Geological Surv

发表于:2018-12-24 / 阅读(141) / 评论(0) 分类 2018CRI中国国际广播电台

When the Arctic Ocean freezes over in the autumn, polar bears set off in search of their favorite meals: fatty ringed seals and bearded seals. By the summer, the sea ice begins to melt and break apart. Deprived of access to the tasty seals, polar bea

发表于:2018-12-24 / 阅读(143) / 评论(0) 分类 2016年Scientific American(十)月

Seventy-nine degrees north latitude is near the top, at the cold edge of the world. In the winter, when temperatures plunge below freezing, there is complete darkness at noon. During summer, the sun shines at midnight, there is no place to hide. Dang

发表于:2018-12-30 / 阅读(261) / 评论(0) 分类 国家地理2007年

She worries a lot. She worries about polar bears. They are big, white bears. They live in the north. They need snow. They need ice. They need cold weather. There is too much pollution. Pollution heats up the Earth. Heat melts the ice. The ice is the

发表于:2018-12-31 / 阅读(197) / 评论(0) 分类 儿童英语小故事

By Paul Sisco Washington 20 April 2007 NASA is preparing to launch a mission to the mesosphere, a region at the top of Earth's atmosphere where mysterious night shining clouds are formed. Little is known about the mesosphere, but its unique ice clou

发表于:2019-01-12 / 阅读(154) / 评论(0) 分类 2007年VOA标准英语(四月)

New Movie Boosts Campaign to Save Polar Bears Polar bears are in trouble. Scientists say only 20,000 remain, and their long term survival could be at risk. The new IMAX movie, To the Arctic, is narrated by actress Meryl Streep. The movie tells the st

发表于:2019-01-13 / 阅读(134) / 评论(0) 分类 VOA标准英语2012年(五月)

New Texas Institute Coordinates Space Medicine Research Since the human space flight adventure began more than 50 years ago, scientists have learned a lot about things like the effects of weightlessness on bones and muscles, and the danger of increas

发表于:2019-01-13 / 阅读(174) / 评论(0) 分类 VOA标准英语2012年(四月)

Polar Scientist Charts Melting Caused by Climate Change Michael Gooseff follows water to the end of the earth. The Pennsylvania State University hydrologist works in remote regions of the Arctic and Antarctic, where ice and frozen ground are thawing.

发表于:2019-01-14 / 阅读(100) / 评论(0) 分类 VOA标准英语2011年(八月)

BBC Learning English Weekender Polar Explorer Amber: Hello, I'm Amber, and youre listening to bbclearningenglish.com. In Weekender today, we listen to an interview with explorer, Rosie Stancer. In March, Rosie sets off on her latest expedition walki

发表于:2019-01-16 / 阅读(168) / 评论(0) 分类 Weekender

By Brian Wagner Washington, DC 04 August 2006 watch Immigration report About a million people took part in marches across the United States this year to voice their concerns about immigration reforms under consideration in the Congress. Young activi

发表于:2019-02-03 / 阅读(186) / 评论(0) 分类 2006年VOA标准英语(八月)

STOCKHOLM, May 8 (Xinhua) -- The 2012 Swedish Polar Music Prize was awarded to the American singer-songwriter Paul Simon and the Chinese American cellist Yo-Yo Ma, the prize committee said in a statement on Tuesday. For five decades, Paul Simon has b

发表于:2019-02-09 / 阅读(139) / 评论(0) 分类 英语新闻

Voice 1 Thank you for joining us for todays Spotlight. Im Rebekah Schipper. Voice 2 And Im Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 Sib

发表于:2019-02-14 / 阅读(118) / 评论(0) 分类 环球英语 Spotlight

The dogsled skimmed silently over the frozentundra. The seal hunter ran alongside it. Sometimeshe cracked his whip against the ice. The snowdrifts looked like giant white sculptures asthe sun slipped behind the frozen hills. Then a fullorange moon ro

发表于:2019-02-17 / 阅读(126) / 评论(0) 分类 汪培珽儿童英文分级书单《神奇树屋》

The dogs were barking wildly at two smallcreatures playing in the moonlight. Polar bear babies! cried Annie. One roly-poly cub leaped onto the other. Then theyboth rolled through the snow. Hi, little bears! Annie called. The cubs jumped up and shook

发表于:2019-02-17 / 阅读(111) / 评论(0) 分类 汪培珽儿童英文分级书单《神奇树屋》

The cubs whimpered louder. They want to go to her, but they're afraid of theice, whispered Jack. Annie petted the cubs. Don't be afraid, she told them. You'll get back toyour mother.The big polar bear growled. She paced back andforth, sniffing the ai

发表于:2019-02-17 / 阅读(114) / 评论(0) 分类 汪培珽儿童英文分级书单《神奇树屋》

Jack, you can get up now, said Annie. Jack opened his eyes. Annie was standing over him. She still had her mask on. We're on safe ground, she said. Jack felt as if he'd been dreaming. He lookedaround. They had reached the tundra at the edge ofthe fro

发表于:2019-02-17 / 阅读(125) / 评论(0) 分类 汪培珽儿童英文分级书单《神奇树屋》

Now only the moon shone on the snow. Jack looked around for the polar bear. She was gone. Where'd she go? asked Annie. I don't know, said Jack. He looked over thetundra. There was no sign of the giant bear or hercubs. Maybe she's not interested in sc

发表于:2019-02-17 / 阅读(118) / 评论(0) 分类 汪培珽儿童英文分级书单《神奇树屋》

BEIJING, June 21 (Xinhua) -- China will launch a new icebreaker for use during an upcoming 2013 polar expedition, a senior oceanic official said on Tuesday. Both the new icebreaker and Xuelong (Snow Dragon), an icebreaker that operated in Antarctica,

发表于:2019-02-18 / 阅读(139) / 评论(0) 分类 英语新闻

Voice 1 Hello, Im Marina Santee. Voice 2 And Im Ruby Jones. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 A tall man stands s

发表于:2019-02-21 / 阅读(143) / 评论(0) 分类 环球英语 Spotlight
学英语单词
-metric,-metrical
5-cells
air-pressure brake
AKV
allogynogenesis
ambassadours
ammonium cerium(iv) nitrate
analyticembedding
annums
atypical pigmented purpura
axton
balance-to-unbalance transformer
bcr(block cell rate)
bodgers
boiling points
brain drain
broad band converter
cable corrosion
Chikreng, Stung
chlorophenols
cold rolled carbon steel
color code resistor
combination truck
concrete pump
dead-band regulator
Dematiaceae
dimethylarsonic acid
discrete frequency function
double intestine
double strength
Dubh, Loch
Eastland County
element of surprise
fay
fibreglass casement fabric
figure into
francis everett townsends
gaslit
get from
glycyrrhetinic
grape-vine
Great Meteor Bank
hapgood
hard facing rod
helborside
hilti
horse mushroom
hot pressed aluminium nitride
incendiary agent
insolubilization
integration sampling technique
isopyre
Japanese barracuda
lost love
machine gas cutting unit
maternity benefits
MDCLXVI
metallic diaphragm indicator
milkboy
modularot voltage
Mokrousovskiy Rayon
monosyllable
MSV (main stop valve)
Noblitina
non-networked
Nymphula
organo-silicate coating
outgive
over-expanded nozzle
overachieve
ozone deficiency
pad weld
paracentesis of anterior chamber
primordial image
quantum relation
reinsurance of cargo
rheum rhabarbarums
roggianite
Sara Kunda
Sautour
self reward
septum corporum cavernosum
settling tower
shambling gait
Shushkodom
sodium red peroxochromate
sottile
syllablize
synchronous hysteresis motor
Taoyuan County
Tollens' reagent
total transmission factor
toxicodermic vaccinid
U-30170
unweighing
upholdsters
vacuum track
vermiform larva
vertical shell boiler
Wenchengia alternifolia
yellowbills