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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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defect of knitted fabric
defectoscope
defectoscopy
defect relation
defects in ceramics
defects in growth sector boundary
defects in semiconductors compound
defects of continuous casting slab or billet
defects of oil and gas pipeline body
defects of wood due to biological damage
defect space
defect state
defect subgroup
defect subspace
defect theorem
defence
Defence Horizon
Defence Meteorological Satellite Program satellite
Defence of Poetry
defence reflex
Defence Support Program
defender
defender duke
defender-general of the state
defender-in-chief
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