 |
不等比例
| 分层取样
| 不等比例 | |
| tech. | inequality proportion |
| 分层取样 | |
| eng.geol. | stratification sampling |
| hydroel.st. | stratified sampling; stratification sampling |
| |||
| inequality proportion | |||
|
不等比例 : 3 phrases in 2 subjects |
| Mathematics | 1 |
| Technology | 2 |
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