英语词汇“late heavy bombardment”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	late heavy bombardment
释义	late heavy bombardment Astronomy noun An event suggested as having occurred during the early history of the solar system, when an exceptionally large number of asteroids may have collided with the terrestrial planets as they were being formed. It is dated to about 4 billion years ago, a time late in the accretion period of the solar system (though not in the history of the solar system as a whole).. Origin 1970s.
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late heavy bombardment