自革命以来的这一段时期是一个政治动荡的时期。
The period since the revolution has been one of political turmoil.
随着世纪交替，移民及其不可避免的经济和政治动荡被称为“下个世纪最大的挑战之一”。
As the century turns, migration, with its inevitable economic and political turmoil, has been called "one of the greatest challenges of the coming century".
宗教催生了朝圣者或移民；战争把难民赶在他们面前，给征服者提供了新土地；政治动荡使成千上万人流离失所。
Religions spawned pilgrims or settlers; wars drove refugees before them and made new land available for the conquerors; political upheavals displaced thousands or millions.
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