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subpopulation
子总体
总体单元按一种或几种可辨别的特征划分成的、研究者所感兴趣的类别或部分。又称研究域。
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subpopulation
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double-crystal spectrometer
double curve
double curved surface
double cusp
double custody system for electronic records and paper records
double cutting hair
double cylinder
double-cylinder-doffer card
double cylinder weft knitting machine
double dagger
double data encryption standard
double data encryption standard, double-DES
double data rate
double data rate, DDR
double-data-rate four
double-data-rate four, DDR4
double-data-rate three
double-data-rate three, DDR3
Double-deck Road
double deoxidation termination method
double-DES
double difference
double-difference phase observation
double differential
double-differential cross-section
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更新时间:2026/6/18 7:20:41