The Nyquist criterion provides a graphical method for determining the stability of a closed-loop system.
奈奎斯特准则提供了一种图形方法来确定闭环系统的稳定性。
女人因为男人的缺点而爱男人；如果男人的缺点足够多，女人什么事都可以原谅他们，哪怕是他们的智力。
"In mathematics, you don't understand things. You just get used to them."
绘画就是用色彩祈祷。
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
It's not what you're looking for trouble, but something that you're not sure of, but in fact, it's not.
数学的美在于它是一种可以以其他任何方式都无法描述宇宙的语言。
Forests are the lungs of our planet; we must treat them with the care they deserve.