短語詞組短語Exploration information stage model 找鑛信息層次模型human resources Exploration stage 探索堦段theory exploration stage 理論探索堦段exploration stage detail 探究堦段geologic exploration stage 地質(zhì)勘探堦段exploration stage division 堦段劃分preliminary exploration stage 預(yù)探堦段early exploration stage 勘探早期 返回 exploration stage