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46.Vision Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well that to develop an acute sense of smell. In the course of evolution members

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alter v. 改变，修改 例句：Annie had to alter her clothes after losing weight. 安妮瘦了以后，衣服也得修改了。 alert adj. 提防的，警惕的，机敏的 n. 警惕，警报 v. 使警惕 例句：Although Alfred's over eighty, h

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I just was always one of those people who wished that I had something from my great, great grandmother, whether it be a brooch or just a note, just something from her. So I wanted to create something that my kids would be able to have from me and so

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There is Paris Jackson revealing more about life of her famous father. She opened up to Oprah Winfrey about being raised by the king of hop, the good and the bad, including being victim of some intended bully and that is how she is coping nearly thre

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Not many scientific studies begin like this: Many hours of watching YouTube clips. Trying to find as many yawns as possible. But for Andrew Gallup, an evolutionary psychologist who studies yawning at the State University of New York, it was all in a

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In spring, as the weather finally warms, the rivers begin to unlock. Broken-ice makes handy barges for lazy water fowl. But the gaps in the ice also give golden-eye ducks a chance to fish. Soon, they are hunting in force. They are not the only ones b

考研背诵50篇——17.Evolution of sleep

Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as far as the reptiles. There is some evidence that the two types of sleep, dreaming and drea

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Study finds chest compressions are the real life-saver Art Chimes | St. Louis, Missouri 29 July 2010 Cardiopulmonary resuscitation, or CPR, has been around in its modern form for about 50 years. Its rhythms of chest compressions and mouth-to-mouth br

VOA标准英语2010年-Cheap Drug Could Cut Accident Deaths D

A low-cost, easy-to-use drug could save tens of thousands of lives each year, according to a new study. The medicine promotes blood clotting and has been shown prevent many accident victims from bleeding to death. Tranexamic acid, or TXA, is not new.

VOA标准英语2011--Cheaper, Safer Pill Targets Tropical Parasite

Cheaper, Safer Pill Targets Tropical Parasite Scientists have developed a new version of a drug used to treat leishmaniasis. The new formulation may help better battle this tropical parasitic disease. Leishmaniasis is transmitted by the bite of certa

VOA标准英语2011--Incumbent Liberian President Leading in

VOA标准英语2011--Incumbent Liberian President Leading in Early Returns First results from Liberia's presidential election show incumbent President Ellen Johnson Sirleaf leading her 15 rivals. Reporting results from just over 16 percent of more th

VOA标准英语2010年-Australia, China Conduct Live-Fire Nav

The Australian frigate, HMAS Warramunga, participated in the first live-firing exercise of its kind with the Chinese navy off the Shandong Peninsular in the Yellow Sea in north-eastern China. The vessel took part in the drill alongside the Chinese wa

美国国家公共电台 NPR Doctor Turns Up Possible Treatment For Deadly Sepsis

DAVID GREENE, HOST: Sepsis, or blood poisoning, is the nation's third-leading cause of death. Researchers now say they've developed a treatment that has been remarkably effective. Here's NPR's Richard Harris. RICHARD HARRIS, BYLINE: One January day t

2007年VOA标准英语-The Map That Named 'America' Now in Washington

By Paul Sisco Washington 02 May 2007 Americans are celebrating a new arrival to Washington D.C. -- one that is 500 years old. VOA's Paul Sisco explains. America's birth certificate on display at the U.S. Library of Congress Across from the U.S. Capit

VOA标准英语2010-Climate Hastened Collapse of Angkor, Capi

Scientist uses tree rings to reconstruct 13th century climate Art Chimes | Washington, DC 05 April 2010 Photo: Photos.com Related Links: Angkor paper (full text) Buckley lab We started seeing these big, giant periods of drought that took place around

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Body Clock Provides Clues to Aging 生物钟提供衰老的线索 If youre searching for the fountain of youth, you might find it in your DNA. Thats according to a new study that sheds light on the biological clock ticking in our genomes, why our bod

VOA标准英语2013--国务卿克里访问哥伦比亚

国务卿克里访问哥伦比亚 It is no surprise that Secretary of State John Kerry chose Colombia- together with Brazil-- for his first official visit to South America. The truth is Colombia and the United States agree on so many different parts

VOA标准英语2011--Life in Haiti's Tent Cities Differs by Location

Life in Haiti's Tent Cities Differs by Location More than half of Haitians who were made homeless by the 2010 earthquake have left their temporary quarters. But 600,000 of them are still living in tent cities, in and around the capital, Port au Princ

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Vivien Leigh 费雯丽 Vivien Leigh was born Vivian Mary Hartley on the evening of Wednesday November 5th, 1913 in her parentshome in Darjeeling, India. She moved to England with her family at the age of 6 in 1920. 1913年11月5日星期三的傍晚，

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When Anothai Kongwattana decided to open a healthful vegetarian restaurant in Bangkok she ran into one minor problem: She couldn't find any organic vegetables on the market. Her solution was to launch her own organic farm. With the help of her husban