以下是etiology与epidemiology的用法辨析，采用分层对比说明：
1. 核心概念差异
- Etiology（病因学）：研究疾病发生的直接原因
* 如：The etiology of Parkinson's disease involves dopamine neuron degeneration.
* 侧重：致病机制、病理生理过程
- Epidemiology（流行病学）：研究疾病在人群中的分布规律
* 如：The epidemiology of COVID-19 shows higher mortality in elderly populations.
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网络相关图 epidemiology etiology
组词比对 epidemiology etiology
epidemiology of hypertension
高血压流行病学
trace the etiology by syndrome differentiation
辨证求因
Epidemiology of Communicable Disease
传染病的流行病学
epidemiology of cancer
癌症流行病学
syndrome differentiation of etiology
病因辨证
epidemiology survey
流行病学调查
identification according to the etiology
病因辨证
EPIDEMIOLOGY & DISEASE CONTROL DIVISION
流行病学及疾病控制署
The etiology is the primary
病因为本
epidemiology of tumor
肿瘤流行病学
of unknown etiology
病原不明的
epidemiology of immigration
移民流行病学
chest pain of uncertain etiology
不明病因的胸痛
epidemiology of prematurity
早产儿流行病学
Etiology of Infertility
不育症的病因学
epidemiology of stomach cancer
胃癌流行病学
