[医] 雌黄, 三硫化二砷

This is scientific Americans 60 second science, I am Sophie Bushwick. got a minute. Tens of millions of years ago, cephalopods were hiding from their enemies in clouds of ink. And it turns out that cuttlefish today produce ink thats almost identical.

发表于:2018-12-24 / 阅读(104) / 评论(0) 分类 Scientific American(五)月

(WA) Human populations near the equator have evolved dark skin over many generations because of exposure to the fierce rays of the Sun. A similar phenomenon has also occurred in other parts of the animal kingdom. The African grass mouse is a good ex

发表于:2018-12-30 / 阅读(115) / 评论(0) 分类 托福听力短文

发表于:2019-01-03 / 阅读(149) / 评论(0) 分类 医务英语

By Scott Stearns White House 18 April 2006 President Bush President Bush is rejecting critics of Defense Secretary Donald Rumsfeld. The president says he has the final say in whether Rumsfeld stays in

发表于:2019-01-07 / 阅读(181) / 评论(0) 分类 2006年VOA标准英语(四月)

Now, heres something you dont see every day: scientists cure color-blind monkeys. According to a report published online in the journal Nature, researchers have used gene therapy to allow color-blind squirrel monkeys to look at their fruit in a whole

发表于:2019-01-08 / 阅读(147) / 评论(0) 分类 Scientific American(九)月

Imagine Van Gogh's paintings of yellow sunflowers. Now imagine the flowers brown. Eh, not so good. Sadly, we may someday see what that would look like. Because the bright yellow paints on the canvas are slowly turning muddy. Now, an international tea

发表于:2019-01-08 / 阅读(127) / 评论(0) 分类 Scientific American(二)月

Broadcast: May 6, 2003 By Caty Weaver VOICE ONE: I'm Sarah Long with Bob Doughty, and this is the VOA Special English program, SCIENCE IN THE NEWS. VOICE TWO: Today, we talk about some disorders of th

发表于:2019-01-11 / 阅读(191) / 评论(0) 分类 VOA2003(上)-健康资讯

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Bob Doughty. Today, we will tell about some disorders of the skin, and ways to treat them. (MUSIC) VOICE ONE: Skin. It is the largest organ of the b

发表于:2019-01-11 / 阅读(157) / 评论(0) 分类 VOA慢速英语2007年(四)月

The United Nations is launching a $35 million emergency appeal for Madagascar, which is suffering from multiple crises, including cyclones, drought and political instability. An aerial view of a part of Morondava, Madagascar shows floodwaters Thursd

发表于:2019-01-13 / 阅读(154) / 评论(0) 分类 VOA标准英语2009年(四月)

if there is sufficient political will within the organ, the African Union can have significant impact on the continent and can have significant impact in ending conflict and ensuring that human rights are respected. - Amnesty International's Noel Kut

发表于:2019-01-13 / 阅读(96) / 评论(0) 分类 VOA标准英语2010年(二月)

A high-level panel led by former South African President Thabo Mbeki has begun work exploring a possible African-led solution to the crisis in Darfur. The panel's opening session heard strong calls for a deferment of International Criminal Court war

发表于:2019-01-13 / 阅读(132) / 评论(0) 分类 VOA标准英语2009年(三月)

Autumn Leaves Show Their True Colors As days grow shorter and nights grow cooler in Boulder, Colorado, the green leaves of summer have been putting on party colors. On cottonwood trees and aspens, theyre golden yellow coins. On Mapleton Avenue, the m

发表于:2019-01-13 / 阅读(168) / 评论(0) 分类 VOA标准英语2011年(十一月)

The incumbent government of Ivory Coast is rejecting the African Union's endorsement of the United Nations certified winner of November's presidential election, saying African leaders are making the situation worse and will be held accountable for a

发表于:2019-01-14 / 阅读(132) / 评论(0) 分类 VOA标准英语2011年(三月)

Experts Cite Underlying Causes for UK Riots London was largely calm Wednesday, but the rioting that engulfed the British capital for the past four nights has spread to other cities, including Manchester and Birmingham. British Prime Minister David Ca

发表于:2019-01-14 / 阅读(129) / 评论(0) 分类 VOA标准英语2011年(八月)

By Noel King Kutum, Sudan 07 March 2007 The African Union mission, charged with monitoring Sudan's Darfur region, shoulders the enormous burden of providing security to some 2.5 million displaced people spread across a remote area the size of France.

发表于:2019-02-05 / 阅读(146) / 评论(0) 分类 2007年VOA标准英语(三月)

It may seem hard to believe that such an unusual looking animal has remained hidden for so long. 世界上存在如此相貌罕见而不为人知的动物,这似乎有点难以置信。 But scientists have only just discovered a new species of elep

发表于:2019-02-05 / 阅读(124) / 评论(0) 分类 英语新闻

At this rate, scientists will have to come up with a better description for the tomato than mere 'superfood'. While it has long been credited with cutting cholesterol and preventing some cancers, the fruit now appears to have two more healthgiving be

发表于:2019-02-06 / 阅读(125) / 评论(0) 分类 阅读空间

Hilary Duff - Come Clean Come Clean Hilary Duff Let's go back Back to the beginning Back to when the earth, the sun, the stars all aligned 'Cause perfect didn't feel so perfect Trying to fit a square into a circle Was no life I defy Let the rain fall

发表于:2019-02-08 / 阅读(128) / 评论(0) 分类 好听的英文歌曲

WASHINGTON, Nov. 14 (Xinhua) -- Nearly a fifth of all Americans 12 years or older have hearing loss so severe that it may make communication difficult, according to a new study led by Johns Hopkins University researchers and published Monday in the A

发表于:2019-02-18 / 阅读(142) / 评论(0) 分类 英语新闻

Q: What is the saddest truth about life? 生活中令人沮丧的真相是什么? 获得9.5k好评的答案@Dushyant Bhati Half the world's starving; the other half is trying to lose weight. 世界上有一半的人正在挨饿,另一半的人却在

发表于:2019-02-18 / 阅读(126) / 评论(0) 分类 阅读空间
学英语单词
aeolian harps
archebacteria
Atecen
attack of a siege
auditable
avoidment
baler bag
betenoire
Big Bertha
bookbindings
bromomoacetamide
BTEC
carrot harvester
cautious of
cerifera
claims protected by lien
commodity entry
complyingly
counter-current cooler
cryptotympana holsti
cues
culture-specific syndrome
cut-out fox
cylinder relief valve
Davel
dinitrotoluenes
diracs
discount stores
Downpatrick
dredging automation
duodenal fistula
esrey
exequaturs
expected payoff
face-pumping laser
free ring
gain one's end s
genus Megaderma
genus recurvirostras
glutamate dehydrogenase
h.o
have gone and done
hide with
hierarchical list
highly deviated
hyperechogenic
icre
impact mill
inconsistent statements
injustices
intrastrands
knowing of
lateral adjustment
leg of a bridge
lushed
medical and dental expenses
Milanese flat warp-stitch knitting machine
monocaryotic phase
murads
neurolytic block
nidra
ocular circle
One above
over-english
pegging back
phosphonium salts
photobiographies
pine to do sth
pineal hormone
pipe tool
pressamina
prestamp cover
questores
resistance silencer
restricted holonomy group
river transport
Schultze's indophenolt uxydase test
scotomata
secondary plant succession
senacal
sentence parts
shaking out machine
siderated
slab beam
subfamily Carpinaceae
sulfide inclusion
Take your hat off
telescopic link
Thaumastocoridae
toxic materials
tractus octavo-spinalis medius
transverse wire brushing
unlabelled statement
vacuum-tube characteristic
vallesine
viatica
warios
welner
whip-her-ginny
wire penetrator
working point