achondrite

n.a stony meteor lacking chondrules

1. Scientists study achondrites to understand planetary differentiation.
   科学家研究无球粒陨石以了解行星的分异过程。
2. Unlike chondrites, achondrites have undergone significant melting and recrystallization.
   与球粒陨石不同，无球粒陨石经历了显著的熔化和再结晶过程。