死者并非无力。死亡，并非无力。
The dead are not powerless. Dead, is not powerless.
数据不是答案，而是问题的开始。
数学的本质在于它的自由。
一个人的工作不过是通过艺术的迂回，重新发现那两三个伟大而简单的形象，正是它们让他的心初次敞开。
The oldest， shortest words—'yes' and 'no'—are those which require the most thought.
You have to fight through some bad days to earn the best days of your life
The future belongs to those who can adapt to change quickly.
For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.
Nothing is funnier than unhappiness.