陨石

His main scientific interest is Comparative Planetary Geology, and in particular Tectonics, Impact Cratering and Astrobiology.

他的科学专长在于比较行星地质学，特别是有关板块运动、陨石碰撞和天文生物学。

Meteorites arriving on Earth are decelerated by passing through our atmosphere.

到达地球的陨石经过我们的大气层时速度会降低。

Some people daily took pills to forget. Others had already become desensitized.

上一次在月球的陨石新闻，已经过了二十几天，想来不可能有人记得。

The ultramafic rocks outcropped at the Altyn region are all harzburgites. Remant grains of primary minerals have melted residual texture and elastic deformation texture under high temperature and pressure. The whole-rock analyses show their low TiO〓 contents (0.01～0.04%), low Al, Ca and high MgO contents and wide Mg〓 range (89.35～95.57). Rare earth patterns have two types, namely tabacco pipe-shped and LREE-shaped, of which the former is often seen. The chondrite-nomalized Yb values of these analyses are all lower than 1. The spinels have low Ti and high Cr content and most spinels have Cr# higher than 60. All of the above characteristics show that the ultramafic rocks in the Altyn fault zone are components of metmorphic peridotites of ophiolite from depleted mantle source and most ophiolites from this zone belong to supra-subduction zone type ophiolite with a few mid-ocean ridge basalt type.

阿尔金露头区的超基性岩全为方辉橄榄岩，残余的新鲜矿物颗粒发育有熔融残余结构和高温高压下塑性变形结构，全岩分析显示样品TiO〓的含量低，为0.01～0.04％，具有低的Al和Ca，MgO含量高，Mg〓为89.35～95.57；稀土配分型式有两种，即烟斗型和LREE亏损型，前者占绝大多数，Yb球粒陨石标准化后的值全都小于1；尖晶石低Ti高Cr，大部分尖晶石的Cr〓大于60，上述特征说明阿尔金超基性岩是蛇绿岩的地幔橄榄岩成员，来自亏损的地幔源区，阿尔金蛇绿岩大多属于俯冲带之上型蛇绿岩，有少量的大洋中脊型蛇绿岩。

The Moon's heavily cratered surface is the result of intense pummelling by space rocks between 4.1 and 3.8 billion years ago.

月球表面遍布的环形山是由41亿年到38亿年前太空陨石剧烈撞击月球而形成的。

The Moons heavily cratered surface is the result of intense pummelling by space rocks between 4.1 and 3.8 billion years ago.

月球表面遍布的环形山是由41亿年到38亿年前太空陨石剧烈撞击月球而形成的。

Some meteorites (～15%) have especially low natural TL,suggesting that they have recently been reheated.

一些具有特别低自然TL值的陨石（～15％）表明经历了近期的加热作用，它们可能以特别小的近日距（＜0.8AU）轨道到达地球上。

Although the lakes were probably created by volcanic activity, meteorite impacts or shifts in the orbit of the planet, they would have created warmer conditions leading to the melting of ice which would have created rives and filled lakes.

尽管这些湖泊可能产生自火山活动、陨石影响或星球运行轨迹的变更，但这些可能造就了温暖的环境，并导致冰的大量融化，从而产生了河流并填充了湖泊。

During Earth's opening act, space debris and cataclysmic volcanic upheavals destroyed the evidence, like an arsonist torching his tracks.

地球早期，剧烈的火山爆发和陨石的撞击，有如纵火者放火灭迹一样，把所有的证据都已摧毁殆尽。

The spherical particles are swept as droplets or volatilized and recondensed from a meteorite as it is heated to incandescence by friction in the upper atmosphere.

球形粒子是由小滴吹刮或者由在高层大气中被摩擦加热到白炽化的陨石挥发并重新凝结而成。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。