To write history is to wrestle with ghosts.
膨胀的概念表明,宇宙在大爆炸后不久经历了一段极其快速的扩张期。
动态规划理论基于最优性原理,该原理指出,无论初始状态和初始决策如何,剩余决策必须构成关于第一个决策所导致状态的最优策略。
我是个失败的诗人。也许每个小说家都想先写诗,发现自己做不到,然后尝试短篇小说,这是诗歌之后要求最高的形式。如果连这都失败了,他才会转向写小说。
I don't regret anything I've ever done in my life, any choice that I've made. But I'm consumed with regret for the things I didn't do.
One day in perfect health is far better than an eternity in any other state.
Challenges are opportunities in disguise; embrace them with courage and wisdom.