The PID controller is a universal tool for the control engineer, applicable to a wide variety of processes.
PID控制器是控制工程师的通用工具，适用于各种各样的过程。
The process of doing mathematics is more important than the result.
In literature, there are no borders; it is a universal language that transcends cultures and geographies.
智力是当你不确定该做什么时所使用的东西。
"It is our choices that show what we truly are, far more than our abilities."