陨石进一步细分为两类：球粒状陨石和无球粒陨石。
Aeroliths are further subdivided into two classes: chondrites and achondrites.
来自南极格罗夫山蓝冰地区的GR99027陨石为一无球粒陨石。
GR99027 meteorite from Blue Ice Area in Antarctica is an achondrite.
（真题）铁矿、陨铁石、球粒状陨石及无球粒陨石在可观测到的陨石中绝不多见。
Irons, stony-irons, chondrite, and achondrites are by no means equally abundant among observed meteorites.
罕见珍稀陨石的主要特征是：1、陨石呈无球粒结构；
The main features of a rare meteorite is rare: 1, non-chondritic meteorites were structure;
罕见珍稀陨石的主要特征是：1、陨石呈无球粒结构；
The main features of a rare meteorite is rare: 1, non-chondritic meteorites were structure;
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