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在“祸福不定的流星雨”这篇文章(wen zhang)中我曾提到,彗星近地运行后所遗留的大量星尘穿过大气层,进而(jin er)形成了流星雨,一场绚丽的天文奇观由此产生,并保留(bao liu)在古人的文字记录...