变换的极分解

I am standing at the North Pole, the very top of the earth. Up here, it's easy to see why the Polar Regions are so cold. The sun never rises high enough in the sky to warm my back. And those rays that do strike the surface are mostly reflected back f

发表于:2018-12-03 / 阅读(162) / 评论(0) 分类 自然百科2011年

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(189) / 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(187) / 评论(0) 分类 2016年Scientific American(十)月

Climate Change Fires Up Polar Bear Treadmill 气候变化害苦了北极熊 Polar Bears spend most of their time roaming the sea ice in search of seals. And seals spend most of their time underneath that ice, avoiding the top predator. But climate ch

发表于:2018-12-24 / 阅读(224) / 评论(0) 分类 2017年Scientific American(八)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(316) / 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(271) / 评论(0) 分类 儿童英语小故事

The Polar Bear's Dinner by Chris Rose So, Im a polar bear, right? Got that? A polar bear. Not one of those brown bears that live in forests and on mountains. One of those big white ones, you know, surely. Where do I live? On an iceberg of course, not

发表于:2019-01-02 / 阅读(233) / 评论(0) 分类 原版英文故事与诗歌

By Paul Sisco Washington 16 May 2008 The United States Government, Wednesday [May 14] officially added polar bears to the list of threatened animals under the Endangered Species Act. Bush administration scientists decided the species is at risk of be

发表于:2019-01-13 / 阅读(138) / 评论(0) 分类 VOA标准英语2008年(五月)

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(185) / 评论(0) 分类 VOA标准英语2012年(五月)

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(128) / 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(223) / 评论(0) 分类 Weekender

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(202) / 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(157) / 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(160) / 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(151) / 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(142) / 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(168) / 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(154) / 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(206) / 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(186) / 评论(0) 分类 环球英语 Spotlight
学英语单词
a soft
annals of local history
arc casting
Astroloba
attrist
balanced gasoline
belt-type exhauster
Blechum
bloodflows
Boeun
Brooks comet
bucca roof
C.in C.
cachectin
calatins
carboxypterin
channel waiting queue
childbearings
Ciliophora
cold mastication
cooling drums
cordlike
cylindrical cutting unit
delbridge
dhawalagiri (dhaulagiri)
direct assignment statement
disheritment
documents against acceptance bill
driving-fit bolt
Finedon
first filial generation
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forty-sixth
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GPRT
group method
hammer box
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high-frequency of recombination strain
hopfield
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IRPA
keckle-meckle
Kornilova, Mys
Krasnosel'kupskiy Rayon
laboratory evaluation
laminar wake
Larompong
law of diminishing demand
legal deed
linkage-mounted
lordship
maximum keying frequecy
megalocaria dilatata
modified modified frequency modulation
motor transport opportunity cost
mumtaz
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nourishingsubstance
nucleus gracilis
open trade
peel off operand
Pettendorf
power of agitator
pressure expansion curve
prize-money
pure friendship
qumix
rate of flow of kinetic energy
resignaled
reversing gear control bracket
roent
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Teutonism
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the worse for wear
This is an interesting floor plan
tollerson
trustiest
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veroniques
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wrothe