年羹尧，清朝著名的军事将领，以其卓越的军事才能和战略眼光而闻名于世。他不仅在战场上屡建奇功，而且在治军方面也有独到之处。《年羹尧善用兵》一文便是对其军事才能的高度概括与总结。

原文如下：

年羹尧治军严明，善于用兵。尝谓部下曰：“用兵之道，在于知己知彼。知彼可以制胜，知己则可保全。”其言简意赅，深得用兵之要领。又云：“兵者，国之大事，死生之地，存亡之道，不可不察也。”此语体现了他对军事的深刻认识与敬畏之心。

年羹尧在作战中注重策略运用，善于灵活应变。他曾说：“兵无常势，水无常形。能因敌变化而取胜者，谓之神。”这句话充分展示了他在战场上的机智与果断。

翻译如下：

Yan Gongyao was a strict and capable military leader during the Qing Dynasty. He was well-known for his extraordinary military talent and strategic vision. Not only did he achieve numerous victories on the battlefield, but he also excelled in managing his troops. "The Art of Yan Gongyao's Military Talent" is a summary and conclusion of his military abilities.

Yan Gongyao emphasized discipline within his army and excelled in the art of war. Once, he told his subordinates, "The way to use troops lies in understanding both oneself and the enemy. Understanding the enemy can lead to victory, while knowing oneself ensures safety." His words were concise yet profound, capturing the essence of military strategy. He also said, "Warfare is a matter of life and death for the state, determining survival or extinction; it must not be taken lightly." This statement reflects his deep understanding and respect for military affairs.

During battles, Yan Gongyao paid attention to the application of strategies and excelled at adapting flexibly. He once remarked, "There is no fixed pattern in warfare, just as water has no constant shape. Those who can win by adapting to circumstances are called divine." These words fully demonstrate his wit and decisiveness on the battlefield.

通过以上文言文及翻译，我们可以看到年羹尧作为一位杰出的军事家，不仅具备深厚的理论基础，更能在实战中灵活运用，展现出非凡的领导力与智慧。他的军事思想至今仍具有重要的借鉴意义。