An asteroid of this size would be expected to leave an immense crater, even if the asteroid itself was disintegrated by the impact.(這樣大小的小行星即使受到?jīng)_擊碎裂之后也會留下一個巨大的隕石坑。)

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.(穿過小行星帶繼續(xù)前進，我們進入了氣體巨行星區(qū)域：木星、土星、天王星、海王星，所有這些都使地球看起來像個侏儒。)

Scientists were debating whether an asteroid was about to hit the Earth.(科學家們在爭論一顆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.(一些科學家假定，小行星撞擊地球?qū)е铝丝铸埖臏缃^。)

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.(那個從一顆小行星殘骸中采集的巖石樣本的年代已達34.7億年，其大小大約是導致恐龍滅絕的那顆直徑為6顆核彈的小行星的兩倍。)

"Asteroid strike?" said Aziraphale.(“小行星撞擊？”亞茨拉菲爾說。)

Will an asteroid hit the Earth?(會不會發(fā)生小行星撞擊地球的事件呢？)

About halfway through that period, known as the Triassic, an asteroid struck Earth.(在那段時期的中間，也就是三疊紀時期，一顆小行星撞擊了地球。)

This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been discovered.(這一銥異常為阿爾瓦雷斯假說提供了強有力的支持，盡管小行星本身從未被發(fā)現(xiàn)。)

If the world wants to know about an asteroid, we have the catalog.(如果世界上有人要了解某顆小行星，我們這里就有它的目錄。)