Though love seems the fastest of all growths, it is really the slowest. No man or woman knows what perfect love is, until they have been married a quarter of a century.
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。
The work of art is a question, not an answer.
最危险的谎言是我们对自己说的谎言。
Care is a state in which something does matter.