movable ecliptic

例句：

1. 1. The planets move around the movable ecliptic.
   行星围绕可动的黄道带移动。
2. 2.Astronomers study the movable ecliptic to understand the movements of the stars.
   天文学家研究可动的黄道带以了解星星的运动。
3. 3. In ancient times, people believed that the movable ecliptic influenced their lives.
   在古代，人们相信可动的黄道带影响他们的生活。