dion

例句：

1. 1.天体，尤指太阳
   Dion is a star.
2. 2. 天体物理学家
   A physicist studying the motion of stars and nebulae.
3. 3. 天体学
   The study of the motion of stars and nebulae.
4. 1.Dion is a star in our galaxy.
   天狼星是我们银河系中的一颗恒星。
5. 2.The astrophysicist discovered that the sun is not alone in its orbit around the galaxy.
   天文物理学家发现太阳并非银河系中唯一的恒星。
6. 3. Dion's position in the Milky Way is crucial for understanding the formation of galaxies.
   天狼星在银河系中的位置对于理解星系的形成至关重要。