《明史·列传·卷九十八》
不易换本兵，武功必定达不到强劲。 
不易本兵，武功必不竞也。 
By not replacing the original soldiers, the military will definitely not be strong.
<s>[INST] For each of the following sets of Classical Chinese and Modern Chinese sentences, provide an English translation that captures the essence of both: Classical: 不易本兵，武功必不竞也。  Modern: 不易换本兵，武功必定达不到强劲。  [/INST] By not replacing the original soldiers, the military will definitely not be strong.</s>
For each of the following sets of Classical Chinese and Modern Chinese sentences, provide an English translation that captures the essence of both: Classical: 不易本兵，武功必不竞也。  Modern: 不易换本兵，武功必定达不到强劲。
user
By not replacing the original soldiers, the military will definitely not be strong.
assistant