vi.迁移,移往;移动;随季节而移居;
vt.使移居;使移植;
例句:
These birds migrate northwards in spring and southwards in fall.
这些鸟春天向北迁徙,秋天向南迁徙.
Birds usually migrate from north to south.
鸟类通常由北向南迁徙。
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。