He strolled like a man in the park without a care or a worry in the world. Like he had>

世界是一个非常复杂的地方，而且它并没有变得简单。

Theorems are eternal; their proofs are ephemeral.

每一个故事都是一次进入未知的旅程。

The most successful businesses are those that put the customer at the center of everything they do.