stellar evolution

例句：

1. 1. The study of stellar evolution is crucialfor understanding the formation and evolution of stars.
   研究恒星演化对于理解恒星的形成和演化至关重要。
2. 2. The discovery of a new type ofstar has sparked interest in stellar evolution.
   发现了一种新型恒星，引发了对恒星演化的兴趣。
3. 3.Scientists are still trying to understandthe complex process of stellar evolution.
   科学家们仍在努力理解恒星演化的复杂过程。