non-spherical       
adjective (also nonspherical) uk/ˌnɒnˈsfer.ɪ.kəl/ us/ˌnɑːnˈsfɪr.ɪ.kəl/
 非球形的
not having a perfectly round shape, like a ball
  A non-spherical projectile is likely to veer off course and miss the target. 非球形射弹很可能会偏离航道并错过目标。 
 Most of the eggs that we looked at were obviously non-spherical.
  - More examples
 - He began his career by studying nonspherical lenses.
 - Large parts of the sediment consisted of non-spherical particles.
 - The earth's non-spherical shape means that these satellites slowly drift away from their intended positions.
 - The photographs sent by the space probe show that the asteroid has a rounded but non-spherical shape.