least-cost combination

例句：

1. 1. The least-cost combination of resources was to use the existing infrastructure.
   资源最低成本组合是利用现有的基础设施。
2. 2.The company's decision to invest in renewable energy is a cost-effective combination of environmental and economic benefits.
   公司投资可再生能源的决定是一种环境与经济效益相得益彰的最小成本组合。
3. 3. To achieve this goal, we need to find the least-cost combination of resources that will allow usto meet our targets without compromising on quality.
   为了实现这一目标，我们需要找到一种资源组合方式，既能够达到我们的目标又不牺牲质量，这是最小成本组合。