The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.
可能近似正确（PAC）学习的概念在计算学习理论中具有基础性意义。
"Stories are like rivers, always flowing, always changing."
No president who performs his duties faithfully and conscientiously can have any leisure.
The surest way to tame a prisoner is to let him believe he’s free.
"Die Frage nach der Technik ist die Frage nach dem Wesen der Technik."
I think it's important to have a balance in life. You can't just work all the time; you have to have fun too.