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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
子总体
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multichannel laser system
multi-channel MAC
multichannel magnetograph
multichannel multipoint distribution service
multichannel multipoint distribution service, MMDS
multichannel photometer
multichannel photometry
multi channel quantum defect theory
multi-channel quantum defect theory
multichannel quantum defect theory
multichannel queueing system
multichannel receiver
multichannel seismic instrument
multichannel seismic survey
multichannel solar telescope
multi channel spectrometer
multi-channel spectrometer
multichannel spectrometer
multichannel system
multi-channel transient electromagnetic instrument
multi-channel transient electromagnetic method, MTEM
multichannel transmission
multi channel Xray fluorescence spectrometer
multi-channel X-ray fluorescence spectrometer
multicharge
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