| 1. | Meteorites have also been analysed, and a few of them appear to be not less than 7, 000 million years old .
有人分析过陨石，其中只有少数陨石的年龄似乎在70亿年以上。 |
| 2. | Large meteor impacts may have occasionally thickened and warmed the atmosphere
大型陨石的撞击则可能偶发的使大气密度及温度增加。 |
| 3. | The meteorite which devastated tunguska is now estimated to have been about 50 metres across
据猜测，毁灭通古斯的陨石的直径有近50英里。 |
| 4. | This new source of peridot displays a beauty of color and transparency not found in the earlier sources
橄榄石也是构成石陨石的主要矿物之一。橄榄石不含石英，因此不能生于花岗岩中。 |
| 5. | Massive meteorite strikes continued for hundreds of millions of years , some blasting craters more than 1 , 000 kilometers in diameter
巨大陨石的撞击持续了几亿年，有些撞击所产生的陨石坑，直径超过1000公里。 |
| 6. | On a simulated lunar surface , visitors can create impact craters by dropping " meteorites " . a cross - section of a meteorite can also be examined through a microscope in this area
观众可在一个模拟的月球表面投下陨石，看环形山如何形成又可利用显微镜观察一块陨石的横切面。 |
| 7. | Studies of the carbon compounds in meteorites show that amino acid , the basic component of proteins and our dna , is falling on the earth every day from space
科学家在研究陨石的碳化合物时，发现每天都从太空落到地球的陨石，竟然包含了组成蛋白质和我们身上dna的基本成份氨基酸！ |
| 8. | The panspermia hypothesis posits that living cells or their precursors could have emerged on another planet or moon billions of years ago and hitched a ride to earth on a meteorite
“胚种假说”假设：活细胞或其前驱物可能于数十亿年前发源自其它行星或月球上，并且搭陨石的便车来到地球。 |
| 9. | Meteorites are extraterrestrial rocks that hit the earth . although the bulk of the materials in meteorites are products of the solar system , we now know that they contain traces of stardust
科学家在坠落地面的陨石内找到微量的细小钻石，而我们知道虽然陨石的主要成分源自太阳系，但它们也蕴含星尘。 |
| 10. | Because the elements of space objects are some different from that of earth , so people can discover the possible locations of meteorite by analyzing the elements of related special mineral and the proportion of elements
因为外来天体陨石的元素构成与地表元素构成有一定的差异，人们还可以通过分析有关特殊的矿物成分以及各成分的比例关系来发现陨石可能分布的地点。 |
