elliptical skirted piston

例句：

1. 1.The elliptical orbit of the planets is fascinating to observe.
   行星的椭圆形轨道令人着迷。
2. 2.The elliptical shape of the galaxy is a result of gravity pulling it in different directions.
   星系的椭圆形状是由于引力在不同方向上拉扯的结果。
3. 3.The elliptical distribution of resources across the region is causing tension between neighboring countries.
   资源在该地区的椭圆分布正在引起邻国之间的紧张关系。