exoatmosphere

例句：

1. 1. The exoatmosphere is a region of space beyond the Earth's atmosphere.
   外层大气是地球大气层之外的一个空间区域。
2. 2.Astronauts often spend time in the exoatmosphere during their missions.
   宇航员在任务期间经常在外层大气中度过时间。
3. 3. The study of the exoatmosphere has significant implications for our understanding of the universe.
   对外层大气的研究对我们的宇宙理解具有重要意义。