Epidemical characteristics of dental caries 龋病的流行特点 ; 龋病的盛行特性
Epidemical characteristic 流行特征
epidemical situation 流行态势
epidemical status 流行现状
epidemical factors 流行因素
epidemical factor 流行因素
epidemical models 传染病模型
In this paper, a discrete stage-structured epidemical model is proposed and studied.
本文主要讨论了离散的阶段结构传染病模型。
Objective To understand epidemical situation of Gnathostoma spinigerum in Wuhua county of Guangdong province.
目的了解广东省五华县棘颚口线虫的流行情况。
Objective To investigate the epidemical range, the distribution features and the state of endemic arsenism in Ying County.
目的查清应县地方性砷中毒病区的流行范围、分布特征和危害程度。
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