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小行星
释义
小行星asteroid minor planet planetoid 小行星xiǎoxíngxīng[asteroid minor plant] 太阳系中的小天体;特指成千上万的小行星之一,它们的轨道大都在火星与木星轨道之间,由波得定则指定的平均轨道近似为2.8天文单位距离,小行星的大小范围从直径几百米到最大的760公里
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relationship
relationship algebra
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更新时间:2025/5/12 15:13:56