mass migration

• 集体迁移

mass migration的用法和样例：

例句

1. The government may organize collective migration of surplus labor forces and encourage the spontaneities of labourers to individually transfer to other regions or industries.
   政府可以根据情况组织剩余劳动力进行集体迁移，并积极鼓励劳动者个人自发的进行跨区域跨行业的迁移。