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跟踪观察研究
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跟踪观察研究
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跟踪观察研究
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longitudinal study
跟踪观察研究
为了研究某一研究对象发展历程或生命周期中的状况,选定合适的观察样本,沿着事实动态发展的轨迹,进行观察,从而探寻其各个发展阶段的规律。又称纵向研究。
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contrast-induced nephropathy,CIN
contrast induced nephro-toxicity,CIN
contrastive
contrastive analysis hypothesis
contrastive focus
contrastive stress
contrast of fringes
contrast of photographic plate
contrast photometer
contrast polyphony
contrast rendition
contrast resolution
contrast reversal
contrast test
contravalency
contravariance
contravariant
contravariant component
contravariant coordinate
contravariant density
contravariant derivative
contravariant functor
contravariant Hom functor
contravariant index
contravariant morphism functor
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