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样本设计相对有效性
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relative efficiency of a sample design
样本设计相对有效性
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understock
understock
understock
understock
understock
understocked
understored trading area
understorey
understory
understrapper
understratum
under strength
understudy
understudy rehearsal
undersubscribed category
under-subscription
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under supply
undersupply
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under suspicion
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