计算复杂性的研究不仅仅是关于问题的分类；它是关于理解计算本身的本质。
The study of computational complexity is not just about classifying problems; it is about understanding the nature of computation itself.
"Memory is a kind of accomplishment, a sort of renewal even."
"I don't think about the past. I focus on the present and the future."
Sometimes I just feel like quitting, but then I think about all the people I’d be letting down.
模型检查的挑战不仅在于发现错误，还在于理解它们为何发生。
一切皆有可能，但没有什么是一定的。
Your most unhappy customers are your greatest source of learning.
I'm just trying to find a way to be happy.
农业科学家的责任就是让土地多产粮食，让农民多收粮食。
