planetary nebulae

• 行星状星云

planetary nebulae的用法和样例：

例句

1. Many objections can be raised to this picture of planetary nebula formation.
   形成行星状星云的这一图象可能会引起许多异议。
2. At the center rests the dying ember of the core of the star.Planetary nebulae can exhibit amazing and intricate structures.
   行星状星云可显示出缤纷的错综复杂的结构。