释义：拖延的本质是自我欺骗，生命的长度由专注的深度决定。

The Soviet Union was a civilization of fear, where people lived in constant dread of the knock on the door at night.

Sometimes, the smallest step in the right direction ends up being the biggest step of your life.

自由民主的传播和世界经济的整合已经创造了一种情况，即大国不再愿意冒险相互开战。