领导者的角色是消除障碍，使团队能够发挥最佳水平。
A leader’s role is to remove obstacles so that the team can perform at its best.
The P versus NP problem is one of the most important problems in computer science.
A man knows when he is growing old because he begins to look like his father.
Science is the knowledge of consequences, and dependence of one fact upon another.