economic ore

例句：

1. 1. The economic ore deposits in the area are of great importance to the local economy.
   该地区的经济矿石矿藏对当地经济非常重要。
2. 2. The discovery of new economic ore deposits has sparked interest in alternative energy sources.
   新经济矿石矿藏的发现激发了对替代能源的兴趣。
3. 3. The mining industry is heavily dependent on the extraction of economic ore.
   矿业行业严重依赖经济矿石的开采。