circumstellar matter

例句：

1. 1.The study of circumstellar matter is crucial for understanding the formation of planets and moons.
   研究环绕星体的物体对于理解行星和月亮的形成至关重要。
2. 2.Circumstellar matter is a key component in the formation of planetary systems.
   环绕星体的物体是形成行星系统的关键成分。
3. 3. The discovery of circumstellar matter has opened up new possibilities for space exploration.
   发现环绕星体的物体为太空探索开辟了新的可能性。