研究发现，巨大的仙女座星云通过侵蚀其他星系的星体来扩张。
The vast Andromeda galaxy appears to have expanded by digesting stars from other galaxies , research has shown .
对银河系和仙女座星云来说，它们并不构成与所有其他星系完全孤立的一对星系。
For the galaxy and the Andromeda nubula do not form a pair of galaxies completely isolated from all others .
仙女座星云