“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	level monitoring device for drilling fluid circulating pool levelness level n-structure level of abstraction level of a factor level of a field level of a function level of aircraft flying qualities level of a modular curve level of an orthogonal array level of a subgroup level of a test level of a tolerance region level of complexity level of description level of detail level of details level of development level of electronic packaging level of error level of factor level of learning level of measurement level of node in tree level of optimization

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