Understanding the computational complexity of learning problems is essential for developing efficient algorithms.

成功是准备遇到机会的时刻。

每一次挫折都是卷土重来的铺垫。

The magi brought valuable gifts, but that was not among them. This dark assertion will be illuminated later on.

【讲解】：聪明智慧的人爱水，有仁德的人爱山。聪明智慧的人爱活跃，有仁德的人爱沉静。聪明智慧的人快乐，有仁德的人长寿。