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。
Don't wait for the perfect moment. Take the moment and make it perfect.
Every breakthrough starts with a question, and every question is a step toward the unknown.
我相信每一个挑战都是一个成长的机会。
In the quest for understanding the cosmos, we must embrace the unknown and the unknowable.
如果你简单，这个世界就对你简单。