他们想迁移到气候较温暖的地区。
他们实际上在观测鱼向上游的迁移活动。
They actually monitor the movement of the fish going up river.
污染工厂已经被迁移或者关闭。
是什么导致了季风的迁移呢？
到了秋天，他们就会迁移到浅水处觅食。
When it is autumn, they move to shallow water and get their food.
这种迁移不能做什么？
在亚洲，是否只有一个或多个移民点向外迁移？
Was there only one outward migration from a single point in Asia, or several from different points?
辅助迁移确实需要这个层次的监督，而且是急需。
Assisted migration really needs this level of oversight, and soon.
保护生物学家们争论的最激进的策略是辅助迁移。
The most radical strategy being debated among conservation biologists is Assisted Migration.
它们中的大多数将不得不迁移到南大洋的孤岛上。
Many of them will have to migrate to isolated islands in the Southern Ocean.
向西部迁移的行为在19世纪30年代达到顶峰。
如果你不停地迁移，你就无法积累大量的物质盈余。
If you are constantly on the move, you cannot afford to accumulate large material surpluses.
很有可能其中一些人后来向东迁移到了哈萨克斯坦。
It's quite possible that some of those people later migrated east to Kazakhstan.
是否应该采用辅助迁移目前主要是生物学界争议的话题。
Whether to use Assisted Migration, this debate is mostly within the biology community right now.
这些新的特性为种子迁移到新的栖息地提供了更好的途径。
These new characteristics offered better ways for the seed to move to new habitats.
起初，他们控制了兽群的迁移以确保获得稳定的肉食来源。
At first, they controlled the movement of the herd while ensuring continuance of their meat diet.
麦克·劳说：“向外迁移的地区使行星和小行星得以生存。”
"Regions of outward migration allow planets and planetoids to survive, " Mac Low said.
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。
Now as far as the Sahara goes, there is some recent literature that points to the migration of the monsoon in that area.
没有更多的研究，我们无法预测辅助迁移是否适用于某一特定的物种。
Without more research, we can't predict if Assisted Migration will work for any given species.
它已经从底特律迁移到了硅谷，在那里，自动驾驶汽车正在焕发生机。
It has migrated from Detroit to Silicon Valley, where self-driving vehicles are coming into life.
海尔提到夏季大白鲨沿着美国东岸迁移，而这海岸正是人们海上活动聚集的地方。
Heil mentioned that great white sharks migrated to the east coast of the United States in summer, and this coast is where people gather at sea.
辅助迁移指的是挑选一个物种的成员，或一组相互依赖的物种的成员，并在物理上移动或迁移它们。
Assisted migration means picking up members of a species, or members of a group of interdependent species and physically moving or translocating them.
她的童年是在不断迁移中度过的。
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