hour angle system

例句：

1. 1.The hour angle system is used to measure the time difference between two locations.
   时角系统用于测量两个地点之间的时间差。
2. 2. In this study, we applied the hour angle system to analyze the impact of climate change on agriculture.
   在这项研究中，我们应用了时角系统来分析气候变化对农业的影响。
3. 3.The hour angle system is a crucial tool for navigation and communication in space exploration.
   时角系统是太空探索中导航和通信的关键工具。