在严冬之中，我发现，在我心中，有一个不可战胜的夏天。

作为一名保护者，父母可通过拥抱与孩子接触。

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.

社会进步需要个体自由与社会责任的有机结合。

Climate change poses the greatest threat to marine life, and we must act now to mitigate its effects.

"Innovation is the lifeblood of any successful organization."