n.劃界；限界
There is no demarcation line along the Yalu River. 鴨綠江是沒有界線的。
There is no sharp demarcation between these two types. 在這兩種結構之間，沒有明顯的分界。
If anyone oversteps the demarcation lines, execute him. 凡是越出自己營地范圍，進入別人營地的，都應加以懲罰。
