Population migration across regions is mainly due to gaps of economic development.

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。

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.

Change of climate must have had a powerful influence on migration.

气候的变化对于迁移必曾有过极大的影响.

The specificity of the hydrogen migration has been demonstrated through the use of deuterated compounds.

这种特殊的氢原子迁移,已经用氘化化合物予以证实.

seasonal migration

季节性迁徙

All results are significant to the research on the population in migration process.

这些结果对于研究人口在迁移过程中的变化有着重要意义.

People migrate to cities like Jakarta in search of work...

人们为找工作而迁移到雅加达这类城市里。

Golden China is considering a more dramatic migration.

金华正成为一家公认的带有戏剧性色彩的公司.

mass migrations

大规模的迁移

Finally, it offers proposals for promoting China's free population migration and perfecting urbanization development. "

最后为促进中国人口自由迁徙,完善城市化发展提出建议.

Farmers have learned that they have to migrate if they want to survive.

农民们已经认识到，想要生存就必须外出打工。

It was also found that the position of substituting group took effect on migration time.

同时发现,芳香环上取代基位置对迁移时间的影响有一定规律.

...a dam system that kills the fish as they migrate from streams to the ocean.

导致鱼类在从溪流向海洋迁徙途中死亡的水坝体系

Most birds have to fly long distances to migrate.

绝大多数鸟类为了迁徙都不得不进行长距离的飞行。

Hakka culture was formed migration southward from area and gradually blending with aboriginal culture.

客家文化是由中原南迁的汉民族所带的中原文化与土著文化相互交融而产生的.

migratory flights/birds

（候鸟）迁徙；候鸟

Such styles reflect a migratory trend: After working abroad, many here are back money and modernity.

这种衣着风格反映了当地流动性的趋势: 从国外打工回来后, 许多人不只带回了钱,也带回了现代化的气息.

The American Robin ( Turdus migratorius ) a migratory songbird of the thrush family.

美洲知更鸟 ( 旅鸫 ) 是画眉科迁徙鸣鸟.

The part that migratory birds play in spreading the virus is still being studied.

迁徙鸟在病毒传播中的作用还在研究过程中.

Yiyang , the site of the outbreak , lies next to Lake Dongting, which hosts many migratory birds.

爆发地 宜阳 临近许多候鸟的聚集地洞庭湖.