“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 二层抽样二级抽样二重抽样两级抽样
随便看	ring gauge ring gauging device ring gear ring gear broach ring girder ring goniometer ring grizzly ring groove ring groove bottom ring groove carbon remover ring groove insert ring groove pad ring groove side ring groove side wear ring ground ring guard ring guide drawing machine ring halogenated ring halogenation ring handle needle ring head ring header ring heater ring holder ring hole

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