The world is full of beauty and ugliness, and it's up to us to choose which one we want to see.

"A book is a gift you can open again and again."

过去从未死去，它甚至还未过去。

In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.

我们教授一门学科不是为了培养关于该学科的小型活图书馆，而是让学生自己学会数学思考。

"La literatura no tiene fronteras, y a través de ella podemos viajar a otros mundos y conocer otras culturas."

无论如何你都得思考，那为什么不往大处想呢？