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理学
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随访
将某一特定人群按是否暴露于某可疑因素或暴露程度分为不同的亚组,追踪观察两组或多组成员结果(如疾病)发生的情况,比较各组之间结果发生率的差异,从而判定这些因素与该结果之间有无因果关联及关联程度的一种观察性研究方法。
Physics
follow-up
①跟踪,随动 ②随动系统
Astronomy
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preliminary design of military aircraft
preliminary design of UAV
preliminary feasibility study of deposit mining
Preliminary General Catalogue
preliminary hazard analysis
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preliminary hearing personnel
preliminary interpretation of remote sensing data for geological features
preliminary investigation
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preliminary orbit
preliminary performance before the big play
Preliminary photography
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preliminary prospected well
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Preliminary Research on Archival science theory and history
preliminary study report on Wuhan Regional Planning
preliminary survey
preliminary work of hydropower project
preliminary work of mining design
preload
preloading
prelocalizing subcategory
prelogical
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