Recursion is the root of computation since it trades description for time.
递归是计算的根源，因为它需要时间来描述。
为你，千千万万遍。
The future of democracy depends on its ability to adapt to new challenges and to renew itself.
有小聪明的人不能让他谋划大事，有小忠诚的人不能让他掌管法律
张大千对绘画题材难易程度的评价。