Up until 1854, there had been a great deal of theorizing concerning the causes and modes of transmission of diseases . 一直到1854年，出现了大量关于流行病起因及传染方式的推理。
Epidemiologic studies continue to unravel the complexities of the biologic setting for malignant disease of the breast . 流行病学研究将继续阐明乳腺恶性肿瘤复杂的生物学决定因素。
Epidemiological studies have suggested an association of carotene intake and resistance to certain types of human cancers . 流行病学的研究表明胡萝卜素进食量与抵抗人某些类型的癌症有关。
It is possible that a description of the methods of epidemiology may stimulate the use of these techniques by a wider range of individuals . 流行病学方法的介绍还可能促进更多的人使用这种方法。
The techniques used for the examination of the result of treatment are closely aligned to some of the general methods of epidemiology . 审察处理结果所用的技术与流行病学某些一般方法是接近一致的。
Control measures based on the cause of the problem may include slaughter quarantine, environmental sanitation, and immunization . 根据流行病的发生原因而采取的控制措施包括屠宰、检疫、环境卫生及免疫接种。
Such approach calls for integrated topic teaching rather than the isolated presentation of the findings of epidemiological studies . 像这样的一个思路，就不是孤立地展示流行病研究所见，而要求我们提出课题的整体指导。
There is a very small but steadily growing proportion of the total manpower in the health field identifying themselves as trained epidemiologists . 在卫生领域的总人力中，经过训练的流行病学家所占比例很小，但这个比例是稳定地增长着。
Over the past few years increasing emphasis has been placed on the need for administrators in the health service to be trained in disciplines such as epidemiology . 在过去几年里，日益强调对卫生机构行政人员要进行某些学科，譬如流行病学的训练。
These three main categories of epidemiological study may each require, as a preliminary phase, a fourth and rather different approach-that is, a method study . 流行病学调查研究的这三个主要种类，每种都需要第四种不同的途径--即方法研究做为其前期阶段。
