... stratification ratio 成层比 stratification sampling 分层取样 stratification testing 分层测试 ...
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... stratified volcano 层状火山 stratified sample 分层取样 stratified language 成层语言,排元语言...
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... laminatedsafetyglass 层压安全玻璃 薄片胶合安全玻璃 夹层安全玻璃 laminatedsampling 分层取样 laminatedshield 层状屏蔽 ...
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应用碳化硅物料的分层取样实验对该理论进行了验证，提出了最佳取样方案。
This theory was verified by the experiment of stratified sampling for chemical analysis of silicon carbide material.
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。
We randomly 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.
方法采用分层多阶段随机抽样法，获取样本。并采取问卷的形式进行调查。
Methods Multistage sampling and stratified sampling were used and information was gathered by interview with questionnaires.
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