migration

名词 migration:

1. the movement of persons from one country or locality to another
2. a group of people migrating together (especially in some given time period)
3. (chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule
4. the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding

1. Scientists have studied the migration of fish over long distances.
   科学家研究过鱼类远距离回游的现象。
2. A movement from one place to another, as by going by, through, over, or across; transit or migration.
   通过从一处到另一处的移动，如经过、穿过、越过或横穿; 转移或迁移
3. There was a huge migration of people into Europe because of the war.
   因为战争，大量的移民涌入欧洲。
4. Seabirds will fly from here to another place for migration every year.
   海鸟每年都要从一个地方迁徙到另一个地方。

mi.gra.tion

n.（名词）
The act or an instance of migrating.
迁移，移居：迁移的行为或实例
A group migrating together.
移民群，移栖群，洄游鱼群：一起迁移的几个群体
Chemistry Physics
【化学】 【物理学】
The movement of one atom or more from one position to another within a molecule.
移动，徙动：在分子内一个或多个原子由一个位置移到另一个位置的运动
The movement of ions between electrodes during electrolysis.
原子移动，电离子移动：在电解的过程中离子在电极之间的移动

【引伸】
migra.tional
adj.（形容词）