政治制度的衰败往往是由于无法适应变化的环境，导致僵化和最终的衰落。
The decay of political institutions is often a result of the inability to adapt to changing circumstances, leading to rigidity and eventual decline.
量子力学让我们能够做到经典物理学中不可能的事情。
我不相信上帝，但我想念他。
The world changes fast, but people's hearts change slowly.
The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
The most important skill for an empirical researcher is not math, but judgment.
The true value of leather lies in its durability and timeless appeal, not just its aesthetics.