进一步的不同人群的大样本调查的翻译：Further different populations of large sample survey 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Further investigation of different populations of large sample

Further different populations of large sample survey

Further different crowd's big sample investigation

Further the different groups of large sample survey

Further different populations of large sample survey