Farmers have learned that they have to migrate if they want to survive.农民已经明白, 他们想继续生存就必须移居。

Millions migrated to the cities.数以百万计的人迁居到城市。

Most birds have to fly long distances to migrate.大多数鸟类为了迁徙都不得不长距离飞行。

a dam system that kills the fish as they migrate from streams to the ocean导致鱼类在从溪流洄游到海洋途中死亡的水坝系统

Every spring they migrate towards the coast.他们每年春天都向沿海地区迁徙。