- water supply and demand balance
- 水资源: water resource
- 供需平衡: co-ordination of supply and ...
- 能源供需平衡: balanced supply and demand of energy
- 水资源供需分析: demand and supply analysis of water resources
- 供需平衡: co-ordination of supply and demand 使供需平衡 even up the supply to meet the demand
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