“二阶抽样”的概念、定义、翻译、参考文献-科学参考

单词	二阶抽样
释义	二阶抽样 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。
随便看	great music is soundless Great National Uprising of India Great National Uprising of Indonesia Great Nebula in Orion Great Nigeria People's Party great ocean conveyor belt Great Orion Nebula great oxidation event great oxygenation event (GOE) great Picard theorem Great Plains great-power chauvinism Great Power in Great Fist great president Great Pyramids, Giza Great Qing Draft Commercial Code Great Red Spot Great Republic of Colombia Great Rift Great Ritual Controversy great russia chauvinism Great Salt Lake Great Sand Dunes National Park and Preserve Great Sandy Desert great saphenous vein

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