cost-effective
🇺🇸
/ˌkɔːst ɪˈfektɪv/
🇬🇧
/ˌkɒst ɪˈfektɪv/
providing the most benefit for the money spent
Using solar panels is a cost-effective way to reduce electricity bills.
使用太阳能板是一种降低电费成本效益高的方式。