追求幸福不是要一直感觉良好，而是要朝着有意义的目标努力。

The past is not static; it evolves with our understanding.

We are all faced with a series of great opportunities brilliantly disguised as impossible situations.

组合数学就像是不用实际计数的计数艺术。

每种材料都有自己的记忆和历史。