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 most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

艺术没有国界，但艺术家有祖国。

"Kindness is a language that everyone can understand."

The quiet revolution in women’s education and employment has transformed society in ways we are still discovering.

预测未来的最好方式就是创造未来。