dividing line

柯林斯词典

1. N-COUNT A dividing line is a distinction or set of distinctions which marks the difference between two types of thing or two groups. 界线[usu sing, oft N 'between' pl-n]
There's a very thin dividing line between joviality and hysteria. 快活和歇斯底里间的界线十分模糊。
2. N-SING The dividing line between two areas is the boundary between them. 分界线[oft N 'between' pl-n]
...people on both sides of the dividing line between Israel and the occupied territories. ...以色列与被占领土分界线两侧的人民。