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| underground pollution | |||
| subsurface pollution | |||
| 地下污染: 85 phrases in 12 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Earth sciences | 1 |
| Ecology | 4 |
| Engineering geology | 4 |
| Environment | 1 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 54 |
| United Nations | 2 |
| Water resources | 13 |
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