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	更新时间：2008/6/29 　» Download Audio Transcript of radio broadcast is not available. 相关主题链接: Supreme Court Rules American Citizens Have Right to Own Guns What Is the Best Place to Visit in the U.S.? Some Opinions Officials Target Mortgage Mess in U.S. US History Series: A Supreme Court Justice Is Put on Trial in 1805 Online Learning Grows, but Research Finds Mixed Results Teaching With Technology in the Information Age Cancer Stem Cells Capture Attention of Scientists A study finds that people who stop smoking often influence other smokers to quit. Adding Up Crop Losses From Midwest Floods In 1968, Americans Kept Wondering: What More Could Happen Next? Fighting Witchweed in African Sorghum Ray Charles, 1930-2004: Singer, Songwriter and Musician Performed Rock-and-Roll, Rhythm-and-Blues, Even Country-and-Western Music