rural exodus

例句：

1. 1. The government has been promoting rural development and reducing the rural exodus.
   政府一直在推动农村发展，减少农村外迁。
2. 2. Many young people have left their rural hometowns to pursue higher education in cities.
   许多年轻人离开了他们的农村家乡，去城市追求高等教育。
3. 3.The rural exodus has had a significant impact on the local economy.
   农村外迁对当地经济产生了重大影响。