PAC学习框架提供了一种正式的方法来分析学习算法的效率和有效性。
Men fear death as children fear to go in the dark； and as that natural fear in children is increased with tales， so is the other.
Climate change is the greatest threat to the future of global fisheries.
Food security begins with resilient farming practices.
我常常在电影中探讨家庭和人际关系，因为这些是每个人生活中不可或缺的部分。
Where returns are concerned, time is your friend. But where costs are concerned, time is your enemy.
在回报方面，时间是你的朋友。但在成本方面，时间是你的敌人。
I am not a hero, I am just an ordinary person.
I am heartily rejoiced that my term is so near its close.