自由市场是经济繁荣的关键。
The natural price of labor is that price which is necessary to enable the laborers, one with another, to subsist and to perpetuate their race, without either increase or diminution.
没有过去就没有未来。
"The essence of acting is truth, and the pursuit of truth is endless."
数学不是关于数字、方程、计算或算法的：它是关于理解的。