"The most thought-provoking thing in our thought-provoking time is that we are still not thinking."

在计算学习的背景下，“可能近似正确”（PAC）学习的概念为理解学习算法的效率和可行性提供了一个框架。

To write is to fight against silence and forgetting.

The biggest risk is not taking any risk.

纵欲之心正炽烈时，一想到将会卧病痛苦，兴致如寒冰；逐利之心正浓烈时，一想到将会命丧黄泉，味道如同嚼蜡。