the process of animals travelling to a different place, usually when the season changes

Christmas Island is known for its annual migration of 50 million bright red land crabs from the forest to the sea. 圣诞岛闻名于世的奇观是岛上的五千万只鲜红色陆蟹每年会从森林向海里移栖。

Some old roads follow the paths of seasonal animal migrations. 有些老路是循着动物季节性迁徙的路径而修筑的。

Scientists track bird populations and migration patterns. 科学家追踪鸟类的数量及其迁徙模式。

the process of people travelling to a new place to live, usually in large numbers

There was a mass migration of poverty-stricken farmers into the cities. 贫困的农民大量迁入城市。

He argues that there are many economic benefits of migration. 他认为，移民有许多经济上的益处。

the process of beginning to use a new computer system, or of moving information from one type of system to another

Thanks for your patience during the migration to the new system. 感谢您在变更到新系统期间的耐心等待。

The processes must include accurate data migration. 这些过程必须包括准确的数据迁移。

the process of customers changing to a new service or to a new company that supplies a service

They are assessing the impact of the migration of 6,000 subscribers to DIRECTV Latin America in the third quarter. 他们正在评估六千名订户第三季度迁移到DIRECTV拉美台所造成的影响。