To move form one country to another for permanent residence. 移民;迁居。 When did the Irish migrate to the United States? 爱尔兰人何时迁居到美国? To go regularly form one climate or region to another at certain times of the year, as many birds. 定期移栖(如侯鸟)。 Some birds migrate north in spring, and south in autumn. 有些鸟春天时迁移到北方,秋天迁移到南方。 |