secondary sampling | |
commer. | 次级抽样 |
space | 二次取样 |
system | |
gen. | 体 |
IMF. | 安排 |
leath. | 网 |
med. | 派 |
met. | 装置 |
met. од. | 系 |
tech. | 制度; 方法 |
tech. од. | 体系; 系统 |
| |||
次级抽样 | |||
二次取样 | |||
二次抽样 |
secondary sampling : 4 phrases in 4 subjects |
Chemistry | 1 |
International Monetary Fund | 1 |
Statistics | 1 |
Technology | 1 |