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Broadcast: May 14, 2003 By Karen Leggett This is the VOA Special English Health Report. One-third of all the people in the world are infected with tuberculosis, or TB, a disease caused by bacteria in
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背景:波罗的海正面临5年来最大的海藻疯长问题。海藻的泛滥不仅对海洋生物的生长造成影响,同时也给对环境变化亮起了一个指示灯。 Satellite images show the green algae spreading across the Baltic fr