写作是一种乐观的行为。如果你觉得它不重要，你就不会费心去做。
"The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter."
What would you do if you weren't afraid?
Personality changes more during your 20s than at any other time in life.
下一场绿色革命将由那些连接传统与创新的人引领。
A proof is a device for convincing someone else that a mathematical statement is true.