Wealth should not be concentrated in the hands of a few, but should be distributed among all through fair competition.
Challenges are what make us grow; embrace them with courage and determination.
当一个人开始长得像他的父亲时,他就知道自己正在变老。
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.