electromagnetic wave distance measuring

例句：

1. 1.The GPS system is used for electromagnetic wave distance measuring.
   全球定位系统用于电磁波测距。
2. 2. The new radar technology can measure the distance between two points in real-time.
   新型雷达技术可以实时测量两点之间的距离。
3. 3. The scientist used a device to measure the distance between the stars.
   科学家使用一个装置来测量星星之间的距离。