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。
每个人都有自己内心的黑暗，是否表现出来取决于个人。
文章是用来承载道理的，道理通过文章得以阐明。
Strategy is not about predicting the future, but about preparing for it.
自己吃饱了应当想到别人的饥饿，身上穿暖了应当想到别人的寒冷，享受安逸应当想到百姓的劳累。
The smallest minority on earth is the individual. Those who deny individual rights cannot claim to be defenders of minorities.
恐惧是自然的反应，但勇气是一种选择。选择勇敢。