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.
研究者通过研究球粒状陨石而得出太阳系的年龄。
It was the study of chondrites that allowed researchers to work out how old the solar system is.
（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.
氪在今天的大气层中比太阳能的氪更重一些，这些氪比埋入了陨星，也就是通常熟知的碳质球粒状陨石中的氪还有重很多。
Krypton in today's atmosphere is somewhat heavier than solar krypton, and the krypton embedded in meteorites known as carbonaceous chondrites is even heavier than that.
实验表明，应用二流体喷嘴可以生产磷酸一铵，应用管式反应器—流化床造粒器可以生产出符合要求的球粒状磷酸二铵。
Experiments show that the use of the two-fluid nozzle allows the production of MAP to be carried out, and the use of the pipe reactor-fluid-bed granulator produces the required spherical DAP.
他有两方面的证据：第一，现存的灾难性撞击的残骸与Baptistina和她的后代有相同的成分，这是必要条件，但并非充分条件，因为含碳的球粒状陨石在其它小行星上也有；
That is a necessary but not a sufficient condition, as the type of rock involved, called carbonaceous chondrite, is found in other asteroids, too.
他有两方面的证据：第一，现存的灾难性撞击的残骸与Baptistina和她的后代有相同的成分，这是必要条件，但并非充分条件，因为含碳的球粒状陨石在其它小行星上也有；
That is a necessary but not a sufficient condition, as the type of rock involved, called carbonaceous chondrite, is found in other asteroids, too.
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