组合数学是不用计数的计数艺术。

文学的美在于它让我们在一生中活出千种人生。

我们对月球表面的了解比对海底的了解还要多。

I have always believed that the way to make money is to buy when everyone else is selling and to sell when everyone else is buying.

Writing for children is a responsibility—they deserve the truth, even when it's hard.

写作是一种生存的行为。