每种材料都有记忆，每个行动都会留下痕迹。

To feel much for others and little for ourselves； to restrain our selfishness and exercise our benevolent affections， constitute the perfection of human nature.

经济发展的关键不仅仅是资源或技术，而是正确的制度和政策。

最大的满足是知道你已全力以赴。