1. Epidemicity yellow fever assaults , Houston early phase develops slowly since being located in many muddy swamps and being suffering, be to transport the cotton harbour only.
   由于地处多泥泞沼泽和遭受流行性黄热病袭击，休斯敦早期发展缓慢，仅为运棉港口。
2. Based on a 8-year surveillance data,a factor analysis theory was used to analyze the 12 risk factors influencing the epidemicity of epidemic cerebrospinal meningitis.
   应用因子分析理论，结合随州市8年来的流脑监测资料，对影响流脑流行的12个因素进行了研究。

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