envelope star

例句：

1. 1. The envelope star is arare and mysterious object that has been thesubject of many scientific studies.
   信封星是一种罕见的神秘物体，已经吸引了许多科学研究。
2. 2. Thediscovery of the envelope star has sparkednew theories about the origins of theuniverse.
   发现信封星引发了关于宇宙起源的新理论。
3. 3. The envelope star has also been usedas a symbol of hope and inspiration invarious cultures.
   信封星也被用作各种文化中希望和灵感的象征。