“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	imaginary root imaginary source imaginary sphere imaginary time dynamics imaginary time Green function imaginary time Green's function imaginary time path integral method imaginary transformation imaginary unit imaginary value imagination imagination following scenes imaginative defence imaginative geographies imaginative joinder of crime imagined interactions imagineering imaging imaging agent imaging analysis imaging Cherenkov telescope imaging-chip technology imaging diagnosis of abdominal disease imaging diagnosis of head disease imaging diagnosis of limb disease

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