界碑

例句：

1. 1. The monument is a symbol of theborder between China and India.
   这座纪念碑是中印两国边界的象征。
2. 2. Thearchaeologists found anancient boundary marker on the site.
   考古学家在遗址上发现了一个古代的边界标志。
3. 3. The monument was erected to commemorate the establishmentof the new border.
   这座纪念碑是为了纪念新边界的建立而竖立的。