陨石的

The outer, non-metallic layers of the planet form what are known as achondrite stony meteorites, and there is a separate class of stony-irons that come from the boundary between inner core and outer layer.

位于行星外部的非金属层形成无球粒陨石石质陨石，在内核和外层之间还存在有一层独立的石质铁层。

If you look over the element ratios we measured, you might conclude that our comet particles look more like chondritic porous IDPs than CI chondrite meteorites.

如果你查看我们测定的元素比率，你将得出结论——我们的彗星颗粒看上去更接近多孔球粒陨石 IDPs 而不是 CI 球粒陨石。

About 90% of meteorites are classified by the successors of Silliman and Kingsley as chondrites.

90%的陨石都分类为球粒状陨石。

Important natural geological analogues are volcanic glass and meteoric glass(anal-ogues of solidified mass), clay minerals (natural analogues of backfill material), iron meteorite and copper deposits (natural analogues of waste containers), natural nuclear reactors, uranium deposits, iron deposits containing Th and REE and contact zones between igneous rocks and other rocks (natural geochemical analogues of HLW repository).

目前已有的地质类比研究对象主要有火山玻璃，陨石玻璃，粘土矿物，铁陨石，铜矿床，铀矿床，含含Th和REE的铁矿床，天然核反应堆和火成岩接触带等。

To reach back, you need to look in the dust grains in chondrites, rather than at the chondrules.

如果是追溯太阳系形成之前，你需要研究球粒状陨石中的灰尘颗粒，而不是陨石球粒。

All 23 meteorites studied belong to ordinary chondrites.

系统的研究确定这些陨石均为普通球粒陨石。

Short-lived radionuclides and long-lived isotope systems are normally used to date chondrites; the former systems can provide only relative ages while the later can provide absolute formation ages of chondrules, in contrast.

陨石年代学研究中常用定年工具包括短半衰期和长半衰期放射性同位素体系，其中前者可以给出陨石形成的相对年龄，而后者则可以给出绝对形成年龄。

In Sable Merles the merle pattern is actually only visible in pups. Later on the effect is nearly invisible.

在Sable的陨石中，其陨石形式只在小时可见，长大后会变化成几乎不可见。

Hovering in the mesosphere, Superman zipped back and forth, desperately pulverizing one huge meteor after another.

带着呼啸声，超人在陨石群中心来回折返着，拼命磨碎一个接一个巨大的陨石。

Spinel-rich spherule is a special Ca-, Al-rich inclusions in chondrites. Two spinel-rich spherules (GRV 020025-3R18 and GRV 021579-3R15) have been found from GRV 020025 and GRV 021579 carbonaceous chondrites collected from the Grove Mountains, Antarctica.

富尖晶石球粒状CAI是球粒陨石中一种特殊类型的CAI，在南极格罗夫山碳质球粒陨石GRV 020025和GRV 021579中共发现两个富尖晶石球粒状CAI-GRV 020025-3RI8和GRV 021579-3RI5。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。