亞晶界

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

The lane is the boundary of our land. 那條小路就是我們這片地的界線。

The ball ran (ie rolled) to the boundary. 球向著邊線滾去。

The boundary is not clearly defined. 這疆界沒有明確劃定。

sub boundary 亞晶界(粒界網(wǎng)狀組織)

The fence marks the boundary between my land and hers. 這道柵欄是我的地和她的地的分界線。