We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too.

估计问题的性质与检验统计假设的问题不同。

释义：广泛地学习，恳切地提问，从而增长知识；行为高尚，言语谨慎，从而修养自身。这是对学习与修养的重视。 

电影制作中最重要的就是故事。没有一个好故事，你什么都没有。

数学是一门活生生的学科，不断演变和发展。