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1·NPR's Ailsa Chang, reports Paul Kevin Curtis is accused of mailing letters with the poison ricin to Obama and at least two other public officials.

据npr新闻的艾尔萨·张报道，保罗·凯文·柯蒂斯被指控向奥巴马及至少其他两名官员邮寄蓖麻毒信。