专家讲解有关中国的保健食品及药品的法律法规。
Experts explaining the laws and regulations on China's health food and drug.
他们在听专家讲解，她是史密斯松宁主管陨石的专家。
They were listening to an expert who is in charge of meteorites at the Smithsonian.
培训期间，清华大学教授、医学和法学专家讲解了中国艾滋病传播的严峻形势及艾滋病防治政策。
Training period, a professor at Tsinghua University, medical and legal experts to explain the spread of AIDS in China and the grim situation of AIDS prevention and control policies.
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