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The secretary gave us a backgrounder on public health issues.
部长就公共卫生问题为我们召开了记者招待会.
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"the secretary gave us a backgrounder on public health issues"
英汉双解词典包含4367426条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。