connected relation

• 连通的关系

connected relation的用法和样例：

例句

1. Only connected interstices can act as elementary conduits within the formation.
   在地层内只有连通的空隙才能起导水通道的作用。
2. Evidently, the graph must be connected in order to contain a spanning tree.
   显然一个图必须是连通的才能包含一生成树。