《晋书·列传·第三章》
祭祀服用，各有等级章法，诸侯不总是用牛，士不总是用猪。
牲牢服用，各有品章，诸侯不恆牛，命士不恆豕。
Sacrificial clothing and utensils, each had their own categories and regulations, and the feudal lords did not always use cows, and the shi did not always use pigs.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 牲牢服用，各有品章，诸侯不恆牛，命士不恆豕。 [/INST] Sacrificial clothing and utensils, each had their own categories and regulations, and the feudal lords did not always use cows, and the shi did not always use pigs.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 牲牢服用，各有品章，诸侯不恆牛，命士不恆豕。
user
Sacrificial clothing and utensils, each had their own categories and regulations, and the feudal lords did not always use cows, and the shi did not always use pigs.
assistant