galex

例句：

1. 1. Galaxiesare the most numerous and varied in theuniverse.
   银河系是宇宙中最丰富多样的。
2. 2.The Milky Way is a galaxy thatcontains billions of stars.
   银河系包含数十亿颗恒星。
3. 3. The discovery of new galaxies has expanded our understanding of theuniverse.
   发现新的星系扩展了我们对宇宙的理解。