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糖尿病患者或见新希望?NMN蛋白质 A substance that the body makes naturally may be a key to rolling back Type 2 diabetes.Researchers used a substance to restore normal blood sugar metabolism in diabetic laboratorymice. Washington Universi

发表于:2018-12-16 / 阅读(507) / 评论(0) 分类 VOA标准英语2016年(七月)

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(496) / 评论(0) 分类 探索与发现2012年

By Sonja Pace London 23 October 2006 Britain's Prime Minister Tony Blair, left, meets with visiting Iraqi Deputy Prime Minister Barham Saleh, Monday Oct. 23, 2006 raqi Deputy Prime Minister Barham Saleh says his government is working to take greater

发表于:2019-01-12 / 阅读(502) / 评论(0) 分类 2006年VOA标准英语(十月)

Somalia's transitional leadership is struggling to form a new government, following the resignation of former president Abdullahi Yusuf, and trying to prevent Islamist extremists from taking control as Ethiopian troops withdraw. Somalia's two top le

发表于:2019-01-13 / 阅读(492) / 评论(0) 分类 VOA标准英语2009年(一月)

Burmese pro-democracy activists have welcomed the stated policy approach by the new Thai government and its call for political change in Burma ahead of Burma's general elections, scheduled for 2010. The Thai Government is also looking to other South

发表于:2019-01-13 / 阅读(548) / 评论(0) 分类 VOA标准英语2009年(一月)

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(527) / 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(542) / 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(491) / 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(514) / 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(499) / 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(524) / 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(548) / 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(638) / 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(512) / 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(495) / 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(540) / 评论(0) 分类 探索与发现2012年

By Robert Berger Jerusalem 02 April 2006 Acting Israeli PM Ehud Olmert, right, and Bank of Israel Governor Prof. Stanley Fischer, April 2, 2006 Israel has formally begun the process of forming a new g

发表于:2019-02-04 / 阅读(579) / 评论(0) 分类 2006年VOA标准英语(四月)

By Bill Rodgers Washington 15 March 2006 The latest sectarian violence in Iraq has raised questions about the future of the U.S. mission to establish a secure and democratic country, three years after

发表于:2019-02-06 / 阅读(783) / 评论(0) 分类 2006年VOA标准英语(三月)

By Alisha Ryu Mogadishu 04 January 2007 In the post-Islamist Somali capital Mogadishu, a deadline for the city's militias and residents to voluntarily hand in their weapons has been largely ignored. As VOA Correspondent Alisha Ryu reports from Mogad

发表于:2019-02-06 / 阅读(564) / 评论(0) 分类 2007年VOA标准英语(一月)

今天我们要学的词是commemorate。Commemorate动词,意思是庆祝、纪念。 U.S. President Donald Trump said it is so foolish for American cities to be removing statues commemorating Confederate generals and soldiers who fought on the lo

发表于:2019-02-24 / 阅读(508) / 评论(0) 分类 英语单词荟萃
学英语单词
1-nonanol
Ansongo-Menaka, Réserve Partielle de Faune d'
apex to mounting surface
as lean as a rake
benching iron
bitter end shack
born fool
borostomias elucens
bromoaryl
built in function
by parol
Carbonera
cast-steel
Cawndilla L.
chandlerian term
chloro-palladate
circulating turbocompressor
clientships
coal-tar asphalt
cock carrying platform
constipations
d channel packet-switched
davallia mariesiis
de facto government
Degrayl
do your stuff
drepanocyte
electrical apparatus
electrochemical processing
Elk Point
emergency intake structure
encephalalgia
entire file
Euler phi function
exeretory tubule
extension by electronic computation
family Polyangiaceae
family Procaviidae
ficoin
fire direction
footpower lathe
foursenery
functional taylor series
garibaldini
Glasbachite
Goteborg sausage
hains
Hallervorden
harned
high speed circuit breaker
hot defecation
howter
inaugurize
inducible phage
intravitelline
issue bonds at discount
Keklau
key lifetime
Kyūragi
Mamoré, R.
Menanga
miscalibrations
multiformis
mydecamycin
observation balloon
particle beam
planned order receipts
plough steel wire
polypoid rhinitis
pre-needling
pudency
pulse width selector
Reichenburg
resumptive pronouns
rock-cut job
rouan
safety criterion
scaly talc
separation anxiety disorder
Septicid
Si rir. perm.
silk winding frame
smoke density chart
sprung rhythms
steel plate deformed
subtranient reactance
succession pattern
supershareholders
taiken
theaceaes
tissey
tortoriello
tranquilorelaxant
transhipment option clause
unvarnished surface
waffle iron memory
water-laid deposit
water-moderated water-cooled reactor
waxbird
wearing
wet batch mixer
who's-in-charge-here