英语词汇“barren efforts”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	barren efforts
释义	barren efforts 基本例句无效的努力 Unfortunately, some sales reps stay with those dry areas, holding on, hoping something will come as a result of their futile efforts.不幸的是，有些销售员一直呆在干涸的地方，坚持，希望他们的无效的努力会得到一些结果。
随便看	activated sludge, activated sewage activated sludge aeration activated sludge bacteria activated sludge-biofilm co-exist system activated sludge biota activated sludge bulking activated sludge concentration Activated sludge cultivation activated sludge culture activated sludge digestion activated sludge disposal activated sludge effluent activated-sludge effluent activated sludge fast-aeration activated sludge filamentation bulking activated sludge filamentous activated sludge floc activated sludge floes Activated sludge immobilization activated sludge immobilized activated sludge inhibition activated sludge kinetics activated sludge loading activated sludge mathematic model activated sludge method