《资治通鉴·宋纪·宋纪十四》
沈文秀据守东阳，北魏军队围城已经三年。东阳外无援兵，士卒日夜抵抗，头盔铠甲不能离身，都生了虱子，但无背叛之心。
沈文秀守东阳，魏人围之三年，外无救援，士卒昼夜拒战，甲胄生虮虱，无离叛之志。
Shen Wenshou was holding on to Dongyang, the Northern Wei army had surrounded the city for three years. There were no reinforcements outside Dongyang, the soldiers defended day and night, their helmets and armor could not be removed, and they were infested with lice, but they harbored no thoughts of betraying.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 沈文秀守东阳，魏人围之三年，外无救援，士卒昼夜拒战，甲胄生虮虱，无离叛之志。 [/INST] Shen Wenshou was holding on to Dongyang, the Northern Wei army had surrounded the city for three years. There were no reinforcements outside Dongyang, the soldiers defended day and night, their helmets and armor could not be removed, and they were infested with lice, but they harbored no thoughts of betraying.</s>
Explain the meaning of this Classical Chinese passage in English: 沈文秀守东阳，魏人围之三年，外无救援，士卒昼夜拒战，甲胄生虮虱，无离叛之志。
user
Shen Wenshou was holding on to Dongyang, the Northern Wei army had surrounded the city for three years. There were no reinforcements outside Dongyang, the soldiers defended day and night, their helmets and armor could not be removed, and they were infested with lice, but they harbored no thoughts of betraying.
assistant