分界线

分界线 [fēn jiè xiàn]

1. ■ line of demarcation; boundary; separatrix; divide; shore:

军事分界线 a military demarcation line;

划定分界线 dilimitation of boundary;

确定分界线 define boundaries;

一条河流成了两国的分界线。 A river forms the boundary between the two countries.