解释：冬天不洗冰水，并不是吝惜冰；夏天不烤火，也不是舍不得火。而是因为这样做对身体不适宜。

"We all have our time machines. Some take us back, they're called memories. Some take us forward, they're called dreams."

The art of life is to live in the present moment, and to make that moment as perfect as we can.

数学不是关于数字、方程、计算或算法的：它是关于理解的。

追求数学真理是一场永无止境的冒险。

When you're young you think you're going to have lots of friends. But as you get older, you realize you can count them on one hand.

帝国的进程向西进行。

Never underestimate the power of a motivated team. They can achieve the impossible.