如果你没有失败,说明你不够努力。
The best mathematics is not just rigorous; it is also elegant.
自动过程发生在无意识、无意图、无努力的情况下,而控制过程需要注意力和努力。
We can easily forgive a child who is afraid of the dark;the real tragedy of life is when men are afraid of the light.
I'm the kind of guy that'll make you wanna slap your grandmama.