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。

Control your expenses better than your competition. This is where you can always find the competitive advantage.

文学是一场无尽的旅程，一条永无止境的道路。

勇气并不在于无所畏惧地冒险，而在于坚决为正义事业而决心前行。

The best time to plant a tree was 20 years ago; the second-best time is now.

Literature is the voice of the silent, the light in the darkness.

史记

传统养殖方法与现代技术的结合是成功的关键。