Debating the part of slaves under a new constitution
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Two films, directors are top Oscar contenders
40 years Later, US abortion opinions remain passionate
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Muslims and Jews share life stories and build friendships in LA
France deploys special forces as terrorism fears grow
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Britain could be on oath to EU exit(视频)
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Words and their stories: food expressions, part II
How babies learn, when, and even in what position
Ocean floor reveals past climate changes
Lifelong bilingualism gives seniors mental edge
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High-tech images show how viruses infect cells
Getting a firm grip on weed control
New technology used to track US flu outbreak(视频)
Up to half of world food production is wasted(视频)
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BlackBerry unveils two new smartphones
Is investing in Africa a good bet?
A look back at Hillary Clinton years as America's top diplomat
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