对于系统，翻版的模拟是在控制图中添加一个创建循环的边，而不仅仅是一个附加节点。
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.
The best way to measure how much you've grown isn't by inches or the number of laps you can now run around the track, or even your grade point average - though those things are important, to be sure.It's what you've done with your time, how you've chosen to spend your days, and whom you've touched this year. That, to me, is the greatest measure of success.
I'm not interested in playing the hero. I'm interested in playing the human.
"The greatest human achievements are the stories we tell each other."
The aim of a college education is to teach you to know a good man when you see one.
A man who dares to waste one hour of time has not discovered the value of life.
Don't let anyone ever dull your sparkle.