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1·The period since the revolution has been one of political turmoil.

自革命以来的这一段时期是一个政治动荡的时期。《柯林斯英汉双解大词典》

2·As the century turns, migration, with its inevitable economic and political turmoil, has been called one of the greatest challenges of the coming century.

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”。

3·[font=Times New Roman][color=#000000]Popular games in China typically feature elves, dwarves or characters that predate the past century of political turmoil.

[font=Times New Roman]中国流行的游戏爱用精灵、矮人等角色，要不就是几个世纪前乱世中的人物。

4·On top of these misguided policies, Japan was going through its own political turmoil and, through no fault of President Obama's, thus unavailable to help maintain the balance of power.

除了所有这些错误的政策，日本自身正处于政治动荡期，虽与奥巴马总统无关，但也无助于维持力量平衡的大局。