social discount rate

例句：

1. 1.The company's decision toinvest in a new technology was influencedby the social discount rate.
   公司决定投资新技术时，受到了社会贴现率的影响。
2. 2. Theeconomist used the social discount rate to estimatethe long-term benefits of a policy.
   经济学家使用社会贴现率来估计一项政策的长期利益。
3. 3. The government has been using thesocial discount rate to calculate the cost-effectiveness of various policies.
   政府一直在使用社会贴现率来计算各种政策的成本效益。