1610s, of persons, 1640s of animals, from Latin migrationem (nominative migratio) "a removal, change of abode, migration," noun of action from past participle stem of migrare "to move from one place to another," probably originally *migwros, from PIE *meigw- (source of Greek ameibein "to change"), from root *mei- (1) "to change, go, move" (see mutable). Related: Migrational.
That European birds migrate across the seas or to Asia was understood in the Middle Ages, but subsequently forgotten. Dr. Johnson held that swallows slept all winter in the beds of rivers, while the naturalist Morton (1703) stated that they migrated to the moon. As late as 1837 the "Kendal Mercury" "detailed the circumstance of a person having observed several Swallows emerging from Grasmere Lake, in the spring of that year, in the form of 'bell-shaped bubbles,' from each of which a Swallow burst forth ...."
双语例句
1. The scale of migration took a quantum leap in the early 1970s.
20世纪70年代初，移民的规模骤然扩大。
来自柯林斯例句
2. During the last recession, migration to the sunbelt accelerated.
在上个经济萧条期，人们向美国南部阳光地带移民的速度加快了。
来自柯林斯例句
3. Birthplace data are only the crudest indicator of actual migration paths.
出生地信息只能非常粗略地显示实际移民过程。
来自柯林斯例句
4. Swallows begin their migration south in autumn.
燕子在秋季开始向南方迁移.
来自《简明英汉词典》
5. The migration consisted of three waves of settlers.
