释义：要了解过去和现在，以便灵活应变，适应变化。

"The most important thing is to stay true to your values."

If you want to see what this nation is all about, you have to ride the rails. Look outside as you speed through, and you’ll find the true face of America.

每个故事都有一个结局，但在生活中，每个结局都只是一个新的开始。

Curiosity is the engine of innovation.