social welfare function

例句：

1. 1.The social welfare function of a country is closely related to its economic development.
   一个国家的社会福祉功能与其经济发展密切相关。
2. 2. The government has been working on improving the social welfare function of the pension system.
   政府一直在努力改进养老金系统的社会福利功能。
3. 3. The social welfare function of education plays an important role in promoting social progress.
   教育的社会福祉功能在促进社会进步方面起着重要作用。