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"The only thing that one really knows about human nature is that it changes."
I've always been a dreamer, and I think that's the most important thing in life—to dream.
解释:国家大而政绩小,国家的影响就跟它的政绩一样;国家小而政绩大,国家的地位也大。
The quality of a country's institutions is the single most important determinant of its long-term economic performance.