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Since the terror attacks on the United States almost nine years ago, other attempted attacks have failed. But should one succeed, medical experts say U.S. trauma centers could be strained by a surge of patients needing emergency care. Since September
发表于:2019-01-11 / 阅读(328) / 评论(0)
VOA标准英语2010年(五)月
VOA标准英语2010年(五)月