“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	symmetrization method symmetrization operator symmetrization principle symmetrized symmetrized multilinear mapping symmetrized polynomial symmetrized product symmetrized representation symmetrized stochastic integral symmetrized tensor symmetrizer symmetroid symmetry symmetry-adapted coefficient symmetry adapted linear combination symmetry adapted linear combination, SALC symmetry adapted molecular orbital symmetry-adapted wave function symmetry analysis symmetry and algebra in conformal field theory symmetry and asymmetry symmetry and balance symmetry and conserved current symmetry and conserved quantity symmetry axiom

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。