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By Melinda Smith Washington 30 March 2007 Since the mid-20th century the World Health Organization reports there has been an increase in the rate of breast cancer among women in developed countries. For decades, doctors have urged their patients to d
2007年VOA标准英语（三月）
RACHEL MARTIN, HOST: The war in Syria is a conflict of the social media age. Cellphones are ubiquitous among the rebels, the government, even ordinary citizens. And that means almost no bad deed goes unrecorded. As NPR's science correspondent Joe Pal
2017年NPR美国国家公共电台6月
New York City is heavily Democratic and Senator Barack Obama is expected to do well Tuesday in the city and throughout the state. VOA's Margaret Besheer talked to voters outside a polling center in Harlem and files this report. Ijeoma Mbamalu rests
VOA标准英语2008年(十一月)
By Chris Mitchell Washington, DC 06 April 2006 watch Medical Imaging report Medical experts have defended medical imaging as a way to improve health care, during a briefing at the U.S. Capitol buildin
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One of the best ways to help improve fluency is to speak about subjects you know well. Speaking about what you know, you'll tend to take more risks as you've probably picked up related vocabulary along the way due to your interest in the topic. Even
英语口语
Afghanistan has become the first country to map its natural mineral resources using an advanced remote sensing technique known as hyperspectral imaging. The mapping, a collaborative effort between the U.S. Geological Survey and the Afghan Geological
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