The two circular security structures pose three fold pressure to Eurasia from the east and west-the pressure from power, from system and from culture.
复合中心圆结构对欧亚大陆自西向东构成三种压力：力量压力、制度压力和文化压力。
The two circular security structures pose three fold pressure to Eurasia from the east and west-the pressure from power, from system and from culture.
复合中心圆结构对欧亚大陆自西向东构成三种压力：力量压力、制度压力和文化压力。
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