VOA常速英语2008年-US Study Estimates One in Four Teenage Girls Ha
时间：2008-03-21 05:31:37
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（单词翻译）
By Melinda Smith
Washington
14 March 2008
The U.S. Centers for Disease Control and Prevention this week released a study estimating that one out of every four teenage girls in the United States is infected with a sexually transmitted disease. The rate is even higher among African-American girls. VOA's Melinda Smith has details of the study, as well as reaction.
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