写作是为了留下痕迹，为了说：我曾在这里，我存在过。

You must take personal responsibility. You cannot change the circumstances, the seasons, or the wind, but you can change yourself.

Critical comments by students should be taken in a friendly spirit， accumulation of material should not stifle the student’s independence.

Nowadays people know the price of everything and the value of nothing.

创新是企业的灵魂，没有创新就没有未来。