《明史·志·卷三十七》
而掌故空乏缺略，想要返还古音，没有途径。
而掌故阔略，欲还古音，其道无由。
However, there was a lack of historical records and documents. It was impossible to restore ancient musical tones.
<s>[INST] Translate the following Classical Chinese text into modern Chinese: 而掌故阔略，欲还古音，其道无由。 [/INST] 而掌故空乏缺略，想要返还古音，没有途径。</s>
Translate the following Classical Chinese text into modern Chinese: 而掌故阔略，欲还古音，其道无由。
user
而掌故空乏缺略，想要返还古音，没有途径。
assistant