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| 自然资源保护 | |||
| 自然环境保护 | |||
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| 自然资源保护 | |||
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conservation of natural resources : 18 phrases in 9 subjects |
| Animal husbandry | 1 |
| Earth sciences | 5 |
| Ecology | 1 |
| Environment | 1 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Name of organization | 2 |
| United Nations | 4 |
| Water resources | 2 |
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