| 释义 |
stratify
UK ['stræt.ɪ.faɪ] US ['stræ-] verb transitive
■to arrange the different parts of something in separate layers or groups 使分层；使成层；将…分组•The sample of people questioned was drawn from the university's student register and stratified by age and gender.调查问卷的抽样人群选自大学的学生名单，按年龄和性别分组。 |