vi.迁移；迁徙；转移

These workers migrate from country to country in search of work. 这些工人为寻找工作从一个国家迁移到另一个国家。

Some tribes migrate with their cattle in search of fresh grass. 有些部落为了寻找新鲜的牧草而带着他们的牲畜迁移。

In some developing countries more and more people migrate to urban area. 在某些发展中的国家，越来越多的人向市区迁移。

Large numbers of birds migrate south every winter. 每年冬季大量的鸟类迁徙南方。

The infected cells then migrate to other areas of the body. 受感染的细胞接着转移到身体的其他部位。