epidemiological investigation短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 流行病学调查 Epidemiological survey on hookworm disease in Xichang City.四川省西昌市钩虫病流行病学调查。 Anepidemiological investigationof the case was unable to uncover a history of exposure to dead or diseased birds.对病例的流行病学调查未发现死禽或病禽接触史。