north polar distance

例句：

1. 1. Theexpedition's goal was to map thenorthern polar distance between two points.
   这次探险的目标是绘制两个点之间的北极距离。
2. 2. Theteam used satellite data to calculate the northpolar distance accurately.
   团队使用卫星数据准确计算了北极距离。
3. 3. The research focused onthe impact of climate change on the northpolar distance.
   研究专注于气候变化对北极距离的影响。