distance mark

例句：

1. 1. The distance between the two cities is 50 kilometers.
   两座城市之间的距离是50公里。
2. 2. The distance mark on the map indicates the location of the next town.
   地图上的距离标记表示下一个城镇的位置。
3. 3. The distance mark on the road sign helps drivers to calculate the time it takes to reach their destination.
   路标上的距离标记帮助司机计算到达目的地所需的时间。