The theory of probabilities is at bottom nothing but common sense reduced to calculus.

解释：不在农忙时役使百姓而耽误农时，那么可以保证百姓富裕。

Hope is not a feeling; it is a doable, dramatic action.

The only thing that can stop you is you.

可持续的基础设施应该平衡经济、社会和环境的效益。

拓扑和量子力学之间的相互作用是一个丰富的研究领域，它以其深度和复杂性不断给我们带来惊喜。