《宋书·志·卷十五》
这已经过几百年，一日之间义恢复古代丧制，恐怕难于实行。 
数百年一旦复古，恐难行也。 
It has been several hundred years, and it will be difficult to implement the ancient mourning system again in one day.
<s>[INST] Translate the following passage from Classical Chinese to both modern Chinese and English, focusing on preserving the emotional tone in both translations: 数百年一旦复古，恐难行也。  [/INST] Modern Chinese: 这已经过几百年，一日之间义恢复古代丧制，恐怕难于实行。  English: It has been several hundred years, and it will be difficult to implement the ancient mourning system again in one day.</s>
Translate the following passage from Classical Chinese to both modern Chinese and English, focusing on preserving the emotional tone in both translations: 数百年一旦复古，恐难行也。
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Modern Chinese: 这已经过几百年，一日之间义恢复古代丧制，恐怕难于实行。  English: It has been several hundred years, and it will be difficult to implement the ancient mourning system again in one day.
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