数学证明的优雅常常反映了它所描述的算法的效率。

The horror of the Twentieth Century was the size of each new event, and the paucity of its reverberation.

You are never too old to set another goal or to dream a new dream.

解决问题是智能系统的核心活动。

真相并不总是美丽的，但对真相的渴望是美丽的。