The key to success is to focus on goals, not obstacles.

Success is a journey, not a destination, and every step counts.

In mathematics, the journey to the solution is just as important as the solution itself.

释义：有时候轻易相信了别人的话，但最终真相会被明白事理的人指出，公道自在人心。

PID控制器的本质在于它能够根据系统的过去和现在状态预测其未来行为。

The world is full of people whose notion of a satisfactory future is, in fact, a return to the idealised past.