The challenge of control is to make systems work in the presence of uncertainty.
控制的挑战在于在存在不确定性的情况下使系统工作。
In mathematics, the journey of discovery is as important as the destination.
A thief is a poor man's best friend.
——《大总统复参议会论国旗函》，1912年2月3日
我不是模特。我只是一个喜欢打扮的女孩。