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| 三个一组〔一套〕 | |||
| 三个一组的 | |||
| 三位一体 | |||
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trinity : 20 phrases in 9 subjects |
| Animal husbandry | 1 |
| Economy | 1 |
| Environment | 1 |
| General | 8 |
| Geology | 1 |
| International trade | 1 |
| Shipbuilding | 1 |
| Technology | 4 |
| University | 2 |
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