系统的稳定性取决于开环传递函数在复平面上的行为。

The great object of all regulations is to secure the utmost quantity of useful produce.

If not me, who? If not now, when?

Future competition is about the industrial chain, we must build a complete ecosystem.

The past is not static; it evolves with our understanding.

The documenta is a mirror of the world's artistic consciousness.

面对挑战要迎难而上，把危机转化为发展机遇。