distance between pole tips

例句：

1. 1.The two countries have a long history of cultural exchanges and cooperation.
   这两个国家有着悠久的文化交流与合作历史。
2. 2.The distance between the two cities is about 500 kilometers.
   两座城市之间的距离约为500公里。
3. 3. The distance between the two points is 10 meters.
   两点之间的距离为10米。