oval nebula

例句：

1. 1. The star is a member of theelliptical nebula.
   这颗星是椭圆星云的成员。
2. 2. Theelliptical nebula is a fascinating object inspace.
   椭圆星云是一个令人着迷的太空物体。
3. 3. The ellipticalnebula is believed to be thebirthplace of many stars.
   人们相信椭圆星云是许多恒星的诞生地。