sample unit
短语词组
- disposition of sample units 样品处理
- symmetry sample units 对称样本单位
- send sample units 送样单位;发送样品单元
- Selection of Sample Units 样本抽出方式
- variance within primary sample units 初级抽样单位内的方差
- variance between primary sample units 初级抽样单位间的方差
- number of units in sample [统计]样本单位数 返回 sample unit