分层任意抽样，分层随机抽样，分层随机取土样

stratified random sample───分层随机样本

stratified random samples───分层随机抽样

stratified sample───分层抽样；[统计]分层样本

stratified samples───分层抽样

random sampling───[数]随机抽样；随意采样

random samplings───[数]随机抽样；随意采样

spread sampling───n.扩展抽样

selected 806 children under 6 years of age from 45 primary anganwadi (childcare) centres in Chandigarh, Punjab, India, that were chosen through multistage stratified random sampling.───在印度旁遮普省昌迪加尔的45所托儿所(anganwadi)中心采用多级分层随机取样法选择了806名6岁以下儿童。

Methods: The number of samples was calculated with the optimum allocation stratified random sampling survey.───应用最优分配随机分层抽样方法确定调查点.

Methods With the method of cluster stratified random sampling, a questionnaire survey was conducted in medical and non-medical higher-educated school in Jilin city.───方法采用整群分层随机抽样的方法，对吉林市某医学院校及非医学高校的在校大学生进行问卷调查。

This study is based on a stratified random sampling sur-vey on passengers traveling by Taipei Metro.

Methods With a method of stratified random sampling, a questionnaire survey was conducted among 786 students from 8 middle schools in Beijing.

Methods A stratified random sampling was conducted among inhabitants with questionnaire and partial health examination in Yunlong district, Xuzhou.

DESIGN: Clustering stratified random sampling, cross- sectional survey.

METHOD Using stratified random sampling method.

DESIGN: A clusting stratified random sampling survey.

The fourth part is an investigation on the state-of-art of the information-literacy education in the Higher Teacher Education Institutions in Chongqing by adopting stratified random sampling.

Methods A questionnaire survey was conducted stratified random sampling among 1689 people in 2 counties.

Though stratified random sampling method is adopted for the arterial and collector functional systems, there is a good potential to improve it.