open-field system
/ˈəʊpənˈfiːld/noun
- the traditional medieval system of farming in England, in which land was divided into strips and managed by an individual only in the growing season, being available to the community for grazing animals during the rest of the year（中世纪英格兰传统的只在耕种季节将土地分割成片由个人管理, 其他时间供社区共同放牧的）开放土地制度。