单词：auripigment
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(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
托福听力短文
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
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
Scientific American(二)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
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
VOA标准英语2010年(二月)
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
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.
2007年VOA标准英语（三月）
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
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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
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