“two-stage sampling”的概念、定义、翻译、参考文献-科学参考

单词	two-stage sampling
释义	two-stage sampling Encyclopedia 农学抽样调查释 two-stage sampling二阶抽样设总体由个初级单元组成，每个初级单元又由若干次级单元组成，在总体中按一定方法抽取若干初级单元，对每个被抽中的初级单元再抽取若干次级单元进行调查的方法。 Mathematics two-stage sampling二次抽样
随便看	short vowel shortwave approximation short wave branch shortwave communication short wave cut-off filter shortwave emergency communications system short-wave fade-out shortwave infrared short wave infrared detection system short-wavelength radiation short wave pass filter short wave propagation short wave radio time service short wave theory short wave transmission system short wave UV reflection photography short weapons Shorty crater Shor算法 Shoshonis Shostakovich,Dmitri Dmirtriyevich shot Shota Rustaveli shot blasting machine shot cleaner

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