point set topology造句

• 4 - intersection theory in point set topology is cited into time domain and topological relation between several temporal forms are analyzed in detail . besides , the paper uses temporal topological relation to describe cadastral changing process particularly
  把点集拓扑学中的四元组理论引用到了时间域中，详细地分析了几种时间形式之间的拓扑关系，用四元组描述的时态拓扑关系对地籍变更过程进行了详细的描述。