短語詞組短語primary recovery factor 一次采油采收率primary control factor 主控因素primary causal factor 主要致病因素primary factor of geology 地質要素primary and secondary factor 因素主次Primary factor -dependent 初級要素依賴primary factor analysis 主因子分析primary factor of production [工經]初級生產要素primary factor model 主因子模型 返回 primary factor