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沟 石 : 124 phrases in 12 subjects |
| Agriculture | 3 |
| Architecture | 6 |
| Bridge construction | 7 |
| Desert science | 2 |
| Ecology | 1 |
| Electronics | 2 |
| Engineering geology | 6 |
| Hydroelectric power stations | 16 |
| Hydrology | 2 |
| Latin | 2 |
| Soil science | 1 |
| Technology | 76 |
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