《逸周书·卷十·武纪解》
疆界遭侵凌，难于再振救。
封疆侵凌，难复振也。
Once a territory has been invaded, it will be difficult to reclaim.
<s>[INST] Kindly elucidate the central themes in this passage in English: 封疆侵凌，难复振也。 [/INST] Once a territory has been invaded, it will be difficult to reclaim.</s>
Kindly elucidate the central themes in this passage in English: 封疆侵凌，难复振也。
user
Once a territory has been invaded, it will be difficult to reclaim.
assistant