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| 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 |