陨石

Small meteorites have left impact craters all over the planet’s surface.

个行星的表面布满了小块留下的撞击坑。

Bright ejecta rays such as these are produced as impacts excavate and eject relatively unweathered subsurface material.

些放射状坑产生于天体撞击溅出的地下物质，绵延在遍布坑的水星表面数百公里。

He discovered an unusual meteorite.

他发现了一块奇异的。

The metallographic cooling rate was measured for the Deng Ujimqin mesosiderite using And profile ac concentration vs.

采用剖面中间浓度与镍纹带宽度关系测定了东乌珠穆沁中铁的金相冷却速率，其冷却速率介于0。

A micrometeorite impact, a snag, a wayward tool or even a misstep can spell doom for an astronaut.

太空人只要给一颗微撞上、给钩住、一个工具失灵、甚至一次失足，都可能万劫不复。

Some people have reported seeing more semivolatile elements in a class of interplanetary dust particles (IDPs) called “chondritic porous” IDPs.

曾有人报告在一类被称作“多孔球粒”的行星尘埃颗粒（IDPs）中见到了较多的半挥发性元素。

Simply introduce the aerolith epigraph of Ming Jiajing, enumerate the lists of inscriptions and horizontal tablet of mosques in Datong area.

随后简单介绍了明嘉靖丙题记，列举了大同辖域清真寺碑刻匾联名单。

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IDPs而不是CI球粒。