英语翻译感谢您对“百度世界2011”的无私奉献和支持,您积极的态度和专业的精神赢得了组委会的一致认可,杰出地完成了志愿者服务工作,特发此证,以资鼓励.

Thanks for your unreserved(毫无保留的,即无私) contribution and support for the of "Baidu World of 2011 (Conference)" and, your energetic/vigorous(有干劲的,充满活力的) attitude and professional spirit ...