释义：天知道，神知道，我知道，你知道。怎么能说没人知道呢？

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.

"Every observation we make is a step closer to understanding the cosmos."

当天赋不努力时，勤奋会战胜天赋。