街道因比夜晚更黑暗的东西而黑暗。
数学中最激动人心的时刻是当你看到以前似乎不相关的事物之间的联系时。
工人和管理层最重要的目标应该是培训和发展机构中的每个人。
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.