短語(yǔ)詞組短語(yǔ)relative utility price ratio 相對(duì)效用價(jià)格比hydropower utility ratio 水能利用提高率resource utility ratio 資源利用率Cost -utility ratio 成本效用比;本效用比;的成本pseudo utility ratio 偽效用比率aggregate utility ratio 綜合效用率 返回 utility ratio