sub-elliptical

例句：

1. 1.The shape of the planet is sub-elliptical, with a large bulge at one end.
   这个星球的形状是亚椭圆的，一端有一个大的凸起。
2. 2.The sub-elliptical orbit of the moon around the earth is well known.
   月亮围绕地球的亚椭圆轨道是众所周知的。
3. 3. The sub-elliptical path of the comet was unexpectedly close to the sun.
   彗星的亚椭圆路径出乎意料地靠近太阳。