economics of water conservancy related fisheries

例句：

1. 1. Economics isthe study of how resources are allocated and used in society.
   经济学是研究社会资源分配和使用方式的学科。
2. 2. The government's economic policies have a significant impact on the country's growth.
   政府的经济发展政策对国家的增长有重大影响。
3. 3.Economic growth has been a major focus of the international community.
   经济增长一直是国际社会关注的焦点。