封臣的

例句：

1. 1. The feudal system of land ownership has long been a subject of scholarly debate.
   长期以来，土地所有制的封建制度一直是学术界争论的主题。
2. 2.The feudal lords were responsible for the maintenance of order in their territories.
   封建领主负责维护他们领地的秩序。
3. 3. The feudal system was characterized by a hierarchical structure and strict social classes.
   封建制度的特点是等级森严的社会结构和严格的社会阶层。