“proportional stratified sampling”概念、定义、翻译-科学时代

单词	proportional stratified sampling
释义	人口学词汇手册 proportional stratified sampling 成比例分层抽样
随便看	rural-urban dichotomy rural-urban dichotomy rural-urban differential rural-urban fringe rural-urban fringe rural-urban imbalance rural-urban integration rural-urban interdependence rural-urban interdependence rural urbanization rural urbanization rural urbanization rural-urban migration rural-urban relation rural-urban relation rural water supply rural water supply rural wire broadcasting network rurban area Ru--Ru （ruthenium） ruscus ruse rush rush rush

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。