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An asteroid of this size would be expected to leave an immense crater, even if the asteroid itself was disintegrated by the impact.(这样大小的小行星即使受到冲击碎裂之后也会留下一个巨大的陨石坑。)
Moving on through the asteroid belt we enter the realms of the gas giant planets: Jupiter, Saturn, Uranus, and Neptune, all of which dwarf the Earth.(穿过小行星带继续前进，我们进入了气体巨行星区域：木星、土星、天王星、海王星，所有这些都使地球看起来像个侏儒。)
Scientists were debating whether an asteroid was about to hit the Earth.(科学家们在争论一颗小行星是否要撞上地球。)
Some scientists hypothesize that the extinction of the dinosaurs resulted from the effects of an asteroid collision with Earth.(一些科学家假定，小行星撞击地球导致了恐龙的灭绝。)
Rock samples taken from the remains of an asteroid about twice the size of the 6-nuke-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old.(那个从一颗小行星残骸中采集的岩石样本的年代已达34.7亿年，其大小大约是导致恐龙灭绝的那颗直径为6颗核弹的小行星的两倍。)
"Asteroid strike?" said Aziraphale.(“小行星撞击？”亚茨拉菲尔说。)
Will an asteroid hit the Earth?(会不会发生小行星撞击地球的事件呢？)
About halfway through that period, known as the Triassic, an asteroid struck Earth.(在那段时期的中间，也就是三叠纪时期，一颗小行星撞击了地球。)
This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been discovered.(这一铱异常为阿尔瓦雷斯假说提供了强有力的支持，尽管小行星本身从未被发现。)
If the world wants to know about an asteroid, we have the catalog.(如果世界上有人要了解某颗小行星，我们这里就有它的目录。)
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