《宋史·列传·卷一百一十八》
敌人来就抵御，等待时机进行讨伐，以光复国土，实现祖宗的大业，这是最上策。
敌来则御，俟时而奋，以光复祖宗之大业，此最上策也。
Resisting the enemy when they arrive, waiting the opportunity to carry out an expedition to recover the state and achieve the ancestors' great cause, this is the best strategy.
<s>[INST] Convert the following modern Chinese text into Classical Chinese: 敌人来就抵御，等待时机进行讨伐，以光复国土，实现祖宗的大业，这是最上策。 [/INST] 敌来则御，俟时而奋，以光复祖宗之大业，此最上策也。</s>
Convert the following modern Chinese text into Classical Chinese: 敌人来就抵御，等待时机进行讨伐，以光复国土，实现祖宗的大业，这是最上策。
user
敌来则御，俟时而奋，以光复祖宗之大业，此最上策也。
assistant