短語詞組短語Exploration information stage model 找礦信息層次模型human resources Exploration stage 探索階段theory exploration stage 理論探索階段exploration stage detail 探究階段geologic exploration stage 地質(zhì)勘探階段exploration stage division 階段劃分preliminary exploration stage 預(yù)探階段early exploration stage 勘探早期 返回 exploration stage