《旧唐书·列传·卷三十》
然而走到洛阳，彗星就出现，这或许是有上天不许可的事。
而行至洛阳，彗星辄见，此或有所未允合者也。
However, when he arrived in Luoyang, a comet appeared. This may have been something that heaven did not allow.
<s>[INST] Transpose the following Modern Chinese text into Classical Chinese: 然而走到洛阳，彗星就出现，这或许是有上天不许可的事。 [/INST] 而行至洛阳，彗星辄见，此或有所未允合者也。</s>
Transpose the following Modern Chinese text into Classical Chinese: 然而走到洛阳，彗星就出现，这或许是有上天不许可的事。
user
而行至洛阳，彗星辄见，此或有所未允合者也。
assistant