migrations

And potential refugee migrations to the United States from the Caribbean region could impact U. S. homeland security, he said.

他说，来自加勒比地区潜在的难民潮有可能影响美国的国土安全。

All seem to be at their peak abundances during their spring (and presumably fall) migrations (Feb-Mar).

这几种银鸥似乎都是在春过境（二月到三月）时达到数量高峰（推测秋过境也是）。

Ratha, manager of the Bank's Migrations and Remittances unit, says a government should view its diaspora like "an untapped pool of oil. "

世界银行移民与汇款局局长Ratha说，政府应将其散居侨民视为“未开发的石油资源”。

Using this tool, as you will soon see, allows you to perform your AIX migrations without the need for lengthy outages.

您很快就会看到，通过使用这个工具，您的迁移过程将不会导致长时间的服务停用。

To lose the long-distance migrations performed by some species would be a grievous diminution.

失去由某些物种执行的长距离迁徙活动将是令人痛心的衰退。

The glass wing is also noted for its long migrations and the fact that the males of the species, when about to meet, practice lekking.

玻璃翅也因它长长的迁徙而著称，并且两种雄性要相遇时，就会求偶集会。

Rails will believe the database is up to date, because you already copied over the schema_migrations table.

Rails将认为数据库是最新的，因为您已经复制了schema_migrations表。

Some, like the two Elwha dams, were built without fish ladders, meaning they serve as completely impenetrable barriers to fish migrations.

一些大坝和这两座埃尔瓦河大坝一样在建造的时候缺乏鱼梯设计，就是说它们完全阻碍了鱼群的洄游。

Migrations are common from rural areas to nearby cities for the same reason, a step up in lifestyle.

移民普遍是由于同样的理由从农村地区迁移到附近的城市，一个生活方式的提高。

Each year, the Serengeti Plains in Tanzania play host to one of the greatest animal migrations on earth.

每年，坦桑尼亚的赛伦盖蒂平原是地球上上演最壮观的动物迁徙的地点之一。

These migrations are all saved and time-stamped, to make it possible to roll back to previous versions of the data structure.

这些迁移操作都会保存，并加上时间戳，让我们可以回滚到数据库结构的上一个版本。

But nowhere, even in today's world of mass migrations, is the sheer range of religious faith as wide as it is in the United States.

但是，即使在大规模移民的今天，也没有任何一个地方的宗教像美国这样丰富多彩。

That the Germans were organized in gentes until the time of the migrations is beyond all doubt.

德意志人在民族大迁徙以前，曾组织成为氏族，这是没有疑问的。

Conclusions: The main causes of the failure are the stone migrations , tortuous or narrow ureters and abnormal opening of the ureters.

结论：结石回漂入肾盂、输尿管扭曲或狭窄、输尿管开口异常是手术失败的主要原因。

At peak migrations times, the sky over Mai Po is dark with ducks and waders, harried by the eagles and hawks that hunt them.

在迁徙最忙碌的时候，米埔的上空全是黑压压的鸭子和水鸟，老鹰们纷纷来掠食。

To see more about migrations, see Crossing borders: Rails migrations.

要查看关于迁移的更多内容，请参阅跨越边界：Rails迁移。

America cannot kick out all its illegal immigrants without undertaking one of the biggest forced migrations in history.

美国若是一棍子将所有非法移民逐出境，那必定是美国历史上最大规模的强迫性迁徙。

Since Alexander the Great, invading armies and peaceful migrations have brought in diverse peoples to this Central Asian crossroads.

从亚历山大大帝以来，入侵者和和平移民就将不同的人种迁徙到这个中亚的十字路口。

If they are such a reservoir, there is a strong likelihood they will carry the virus with them in subsequent migrations.

如果野鸟是这类寄主，它们将很有可能在随后的迁移行动中携带病毒。

Many have experienced strong net migrations out of the city over the last 20 and 30 years.

很多城市在过去二三十年中经历了大规模的对外净迁移。