在计算学习的背景下，“可能近似正确”（PAC）学习的概念为理解学习算法的效率和可行性提供了一个框架。
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.
The novel is the only place where all contradictions can coexist.
翻译：准备各种物资以充分利用，制成器具给天下带来利益，没有比圣人更伟大的了。
过去总是紧张的，而未来是完美的。
There are 360 degrees, so why stick to one?