These strategies have widely different characteristics with respect to migration effort and migration period, as shown in figure 1.
这些战略在迁移所需的工作量和迁移周期方面差异很大，见图1。
We analyzed the weather background during the major immigration period in 1999, and stimulated temporal-spatial dynamics of wind field and migration trajectories of the meadow moth.
本文分析了1999年各地草地螟主要迁入峰期的天气学背景，并对风场的时空分布及草地螟迁飞轨迹进行了模拟。
By looking at the fossil record from that period of time - before the Red Sea was formed - we can gain a clearer view of which species survived this great migration and which did not.
通过观察这一时期——红海形成之前——的化石记录，我们就能更清楚地知道哪些物种在这次大迁徙中活了下来，哪些没有。
Rules on family migration (covering immigrants from outside the European Union) are entering a period of upheaval.
家庭迁移（从欧盟外的国家移入者）的规定进入了一个大的调整期。
Objects or attributes relating only to the new version will be lost after a backward migration, and therefore you should not backward migrate after running the new version for an extended period.
与新版本相关的对象和属性在向后迁移后将丢失，因此在运行新版本较长一段时间后最好不要进行向后迁移。
The migration and emergence (incubation period) of the worm (s) take between 10 to 14 months after infection.
成虫的游走和钻出(潜伏期)在感染后的10至14个月之间出现。
In Ireland, where discouragement among young workers has shot up since 2005 (see chart 2), migration doubled over the same period, with most of the departed between 20 and 35.
在爱尔兰，青年工人的沮丧率自2005年起开始飙升(见图2)，移民在同期翻倍，而大多数移民在20岁到35岁之间。
The wide development strata overlap belt of different period and different level provided passage for petroleum migration, created beneficial reservoir conditions for strata reservoir formation.
不同时期、不同级别的地层超覆带的广泛发育为油气运移提供了通道，也为地层油气藏的形成创造了有利的圈闭条件。
The Late Mesozoic characterized by higher temperature gradient is main period of gas generation and migration of Paleozoic coal series and carbonates.
中生代晚期地温梯度高，是古生界碳酸盐岩及煤系地层的主要生气期和运移期。
This is a period of history that should not be forgotten, and is a subject that can't be neglected in population migration history of the 20th century as well.
这是一段不应忘记的历史，也是20世纪人口迁移史上一个不可忽略的课题。
The migration nature of fluid and post-reformation of petroliferous basins resulted in multi-period of migration, accumulation, pool-forming and destruction of oil and gas in geological history.
流体本身的运移性与含油气盆地后期的改造作用，导致了油气流体在地质历史上可具有多期运移、聚集、成藏和破坏的过程。
We propose several novel data migration and data reorganization algorithms and query processing methods in the reorganization period, which can get the optimal performance.
本文提出的数据迁移和数据重组算法以及在线重组期间的查询处理方法，能够有效地支持在线重组期间对用户查询的快速响应。
After the late structural transformation, the late sourcing period and the late oil and gas migration in the basin are controlled by post-transformation structural configuration.
在经历后期构造改造后，盆地的晚期生烃及晚期油气运移受改造后的构造格局控制。
Applying effective migration rules and learning strategies can help foreign language learners to improve their learning efficiency and enlarge their knowledge capacity during a limited period.
应用有效的迁移规律和教学策略，外语学习者可以在有限的时间内提高学习效率，扩大知识容量。
The migration gets equilibration in a period of time.
增塑剂的迁移经一定时间后达到平衡。
After the starting of hydrocarbon migration, sealing characteristics of developing fault changes actively and leads to strong remigration in the same period.
油气移聚期开始后，发育中的断层的封闭性将活跃地转化，引起强烈的再运移。
Yanshanian period is the main stage for migration and accumulation of oil and gas in this basin.
燕山期是盆地油气运移和聚集的主要时期。
Migration in the period of economic transformation has also speeded up family structural changes.
经济转型中人口迁移流动加速也促使家庭类型变化。
The reservoirs were fully filled by the CO_2 gas during a short period, which prevented the hydrocarbon gas from further migration into the reservoirs to form the CO2 gas pools.
由于CO_2气突发性大量注入而充满了储层空间，阻止烃类气体进一步注入，因而形成CO2气藏。
The period of migration and accumulation of oil and gas is Triassic system and from Jurassic system to Cretaceous system.
两个成藏期分别是三叠纪末和侏罗纪末—白垩纪；
The period of migration and accumulation of oil and gas is Triassic system and from Jurassic system to Cretaceous system.
两个成藏期分别是三叠纪末和侏罗纪末—白垩纪；
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