“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	fundamental relation fundamental relaxation fundamental representation fundamental research fundamental resonance fundamental retract fundamental rights and duties of states fundamental rights of the citizen fundamental risk factor fundamental root system Fundamental Rule of Chart Parsing fundamental semi-invariant fundamental sequence fundamental series fundamental set fundamental sheaf fundamental simplex fundamentals of aerothermodynamics Fundamentals of Ecology Fundamentals of Rock Mechanics fundamentals of welding fundamental solution fundamental solution matrix fundamental solution method fundamental space

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