border of oval fossa

例句：

1. 1. Theborder between China and India is very thin.
   中国和印度之间的边界非常狭窄。
2. 2. Theborder town has a lot of history toexplore.
   这个边境小镇有很多历史可以探索。
3. 3.The border patrol keeps an eye on thecrossing points.
   边境巡逻队监视着过境点。