《战国策·东周·谓周最曰魏王以国与先》
如果发生变故，请让我替魏国去救助齐国；如果未发生变故，只要等到秦国被孤立，大王就可以出兵讨伐它。
而有变，臣请为救之；无变，王遂伐之。
If there is a change, please let me go to the State of Qi for Wei; if there is no change, as long as the State of Qin is isolated, the King can send troops to attack it.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 而有变，臣请为救之；无变，王遂伐之。 [/INST] If there is a change, please let me go to the State of Qi for Wei; if there is no change, as long as the State of Qin is isolated, the King can send troops to attack it.</s>
Explain the meaning of this Classical Chinese passage in English: 而有变，臣请为救之；无变，王遂伐之。
user
If there is a change, please let me go to the State of Qi for Wei; if there is no change, as long as the State of Qin is isolated, the King can send troops to attack it.
assistant