Research on the in-migration influence of rural labor on the urban employment issues is much important to both the government and academic fields.
研究农村劳动力进入城市后对城市就业的影响，有着非常重要的意义。
It has been frequently assumed, but not proved, that the majority of the migrants in what has come to be called the Great Migration came from rural areas and were motivated by two concurrent factors.
人们常常假设，但没有证据证明，在所谓的“大迁移”中，大多数移民来自农村地区，这是由两个同时发生的因素推动的。
Now as far as the Sahara goes, there is some recent literature that points to the migration of the monsoon in that area.
随着撒哈拉沙漠的移动，近期一些文献指出了该地区的季风迁移。
"Old America seemed to be breaking up and moving westward," observed an English visitor in 1817, during the first great wave of migration.
1817年，在第一次移民大潮中，一位英国游客观察到：“古老的美洲似乎正在分裂并向西移动。”
And some people take this a step further, and they hypothesize that this migration actually provided an important impetus in the development of ancient Egypt.
有些人对这方面做了进一步的研究，并假设这次的迁移实际上为古埃及的发展提供了一个重要的动力。
Was there only one outward migration from a single point in Asia, or several from different points?
在亚洲，是否只有一个或多个移民点向外迁移？
We think of this as an old person's migration, but it created many jobs for the young in construction and health care, not to mention tourism, retail and restaurants.
我们认为这是老年人的迁移，但它在建筑和医疗保健领域就为年轻人创造了许多就业机会，更不用说在旅游业、零售业和餐饮业中了。
In addition to all that, it is not even clear that assisted migration or any migration for that matter, will help at least for some species.
除此之外，我们甚至不清楚辅助迁移或任何相关的迁移是否至少对某些物种是有帮助的。
They probably never numbered more than a few thousand in total, and in their rapid migration eastward they encountered hundreds of islands—more than 300 in Fiji alone.
他们的总人数可能从来没有超过几千人，在他们迅速向东迁移的过程中，他们遇到了数百个岛屿——仅在斐济就有300多个。
Urbanization—migration away from the suburbs to the city center—will be the biggest real estate trend in 2015, according to a new report.
一份新的报告表明，城市化，即从郊区迁移到市中心，将成为2015年最大的房地产趋势。
Their migration may have been set in motion by an increase in population caused by a movement of peoples fleeing the desiccation, or drying up, of the Sahara.
他们的迁徙可能是人口增加引起的，这一人口增长是由人们逃离撒哈拉沙漠的干燥或干涸的迁移造成的。
When the planetarium sky matched the sky outside, the birds fluttered in the direction of their normal migration.
当天文馆的天空与外面的天空相匹配时，鸟儿们就朝着它们正常迁徙的方向飞翔。
Each year red-winged blackbirds stop in a certain region of Midland Province on their spring and fall migration.
每年春天和秋天，红翼黑鹂都会在米德兰省的某个地区停留。
Early in his research, Kramer found that caged migratory birds became very restless at about the time they would normally have begun migration in the wild.
在克雷默早期的研究中，他发现被关在笼中的候鸟在它们通常开始在迁徙的大致时间会变得非常不安。
Our concern is with movement between nations, not with internal migration within nations, although such movements often exceed international movements in volume.
我们关注的是国家之间的流动，而不是国家内部的流动，尽管国内流动的数量经常超过国际流动。
The wildebeests follow, in their migration, the pattern of local rainfall.
角马在迁徙时遵循当地降雨的模式。
We hold the record for the longest migration of any animal in the world!
我们保持着世界上动物迁徙距离最长的记录！
Migration is a complex issue, and biologists define it differently, depending in part on what sorts of animals they study.
迁徙是一个复杂的问题，生物学家对此有不同的定义，定义的方法部分取决于他们研究的动物种类。
When autumn arrives in the United States and Canada, you can see one of nature's greatest scenes—the yearly migration of the monarch butterflies.
在美国和加拿大的秋天到来时，你可以看到大自然最壮观的景象之一——帝王蝶一年一度的迁徙。
In one case, a group of conservationists has already taken it upon itself to try on their own to save an endangered tree, the Florida Torreya tree, through Assisted Migration.
在一个案例中，一群自然资源保护主义者已经自己采取行动，通过协助迁徙的方式来拯救一种濒临灭绝的树——佛罗里达香榧树。
But daily vertical movements by zooplankton in the ocean—upward by night to seek food, downward by day to escape predators—can also be considered migration.
但是海洋中浮游动物每天的垂直运动——夜里上浮以寻找食物，白天下潜以躲避捕食者——也可以被视作迁徒。
Supports object, data, and authorization migration in support of database migration scenarios.
通过支持对象、数据和授权迁移来支持数据库迁移场景。
Compatibility should be tested thoroughly — and early in the migration cycle — in case alternatives need to be sought.
兼容性应该经过彻底的测试，为以防万一，在迁移周期的早期就应该寻找替代产品。
Migration could reduce the amount of disease as infected animals are left behind to die, but changes in migration might prevent such natural purging of infections, the review says.
这份综述说，随着被感染的动物掉队死亡，迁徙可能减少疾病数量，但是迁徙的变化可能阻止这种天然的防止感染的措施。
The DAD to annotated XML schema generator tool will help users in migration by converting the DAD to an equivalent annotated XML schema, thus making the task of migration much easier.
DAD到带注释的XML模式生成工具通过将DAD转换成一个等价的带注释的XML模式，使得迁移任务容易得多，来帮助用户进行迁移。
This is the final step in migration of a database from a source to the Informix target.
这是将数据库从源迁移到Informix目标过程中的最后一步。
This shows what to expect in migration scenarios where the conversion of the user mail files to the Domino 7 template may occur later than the server upgrade.
这些结果可以说明，在将用户邮件文件转换成Domino7模板而不是对服务器进行升级这种迁移情况时，我们可以期望获得的改进结果。
This policy may be most useful in migration scenarios when coupled with some sort of clean-up mechanism associated with the alternate source.
在迁移场景中，当与关联于备用源的某些类型的清理机制结合使用时，这个策略可能是最有价值的。
Since there is an association between storage system and storage class, objects will move along the designated storage system according to the rule set in migration policy.
由于存储系统和存储类之间存在关联，因此对象将根据移植策略中设置的规则移动到指定存储系统中。
As migration policy and group are the required fields for workstation collection, in migration policy itself is the storage classes, whilst storage group contains the storage system.
由于移植策略和组是工作站集合必需的字段，因此移植策略本身是存储类，而存储组包含存储系统。
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