When the third appeared, he thrust at it with the knife, only to feel the blade[刀片] snap as the fish rolled. 

计算机科学对社会的影响是深远而广泛的。

真正的悲剧是那个人生中从未为他的一次至高无上的努力振作过，从未发挥过他的全部能力，从未挺直过他的全身。

可持续性不仅仅是一个流行词，而是我们对后代的责任。

Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one.