The fundamental problem of automatic control is to maintain a desired state in the presence of disturbances.
自动控制的根本问题是在存在干扰的情况下维持期望状态。
能源行业必须成为气候解决方案的一部分，而不是问题的一部分。
A novel is a long piece of prose with something wrong with it.
Sustainability is not an option; it's the only path forward for agriculture.
A problem is not solved by mechanically applying past experience, but by restructuring the situation.
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。