cost-effectiveness
noun(also cost-efficiency)
[uncountable]the ability to give the best possible profit or benefits in comparison with the money that is spent 成本效益：与花的钱相比，能够获得最大可能的利润或收益的能力 The environmental benefits and cost-effectiveness of the different options were clear. 不同方案的环境效益和成本效益是显而易见的。