优化是在给定约束条件下做出最佳选择的艺术。

音乐是自我的反映。我们只是解释它，然后我们收到支票。

面对挑战，我们必须保持韧性和创新。

Every forest began with a single seed, just like every great enterprise.

我从没有爱过这世界，它对我也一样。

Every improvement in the circumstances of the society tends either directly or indirectly to raise the real rent of land, to increase the real wealth of the landlord, his power of purchasing the labour, or the produce of the labour of other people.