Feedback is the key to robust control.
反馈是鲁棒控制的关键。
好老师不是注满一桶水，而是点燃一把火。
It is wrong to have an ideal view of the world. That's where the mischief starts. That's where everything starts unravelling.
Even in abstraction, mathematics has profound real-world applications.
过去是知识的巨大源泉，但也是幻觉的巨大源泉。
战略101是关于选择的：你不可能成为所有人的一切。
【解释】鱼是我所想要的，熊掌也是我所想要的，如果这两种东西不能同时得到，那么我就只好放弃鱼而选取熊掌了。