1、Curzon line: Demarcation line between Poland and Soviet Russia.
寇松線：波蘭和蘇俄之間的邊界線。

2、Where is the fine demarcation line between Love and Friendship?
哪里是友誼和愛情的細(xì)微分野？

3、There is no demarcation line along the Yalu River.
鴨綠江是沒有界線的。