ground point

例句：

1. 1. The satellite was launched from the ground point in the south of China.
   这颗卫星是从中国南部的地面点发射升空的。
2. 2.The scientist used a telescope to observe the earth from its ground point.
   科学家使用望远镜从地球的地面点观察地球。
3. 3. The team decided to set up a ground point for their experiments.
   团队决定设立一个实验地面点。