sub-boundary

亚晶界

I had to sub for the referee, who was sick. 裁判病了，我得代为裁判。

The lane is the boundary of our land. 那条小路就是我们这片地的界线。

The ball ran (ie rolled) to the boundary. 球向著边线滚去。

The boundary is not clearly defined. 这疆界没有明确划定。

sub boundary 亚晶界(粒界网状组织)

The fence marks the boundary between my land and hers. 这道栅栏是我的地和她的地的分界线。