自由民主的传播和世界经济的整合创造了一种情况，即大国不再愿意相互开战。
The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to go to war with one another.
Quality should never be compromised for the sake of speed.
数学中最深刻的思想往往来自最简单的问题。
画布是一面镜子，不仅反映艺术家的灵魂，也反映社会的灵魂。