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天极
释义
天极celestial pole 天极tiānjí(1)[celestial pole]天球上的两点之一,在这两点周围的恒星都呈现周日运动。对于地球,地轴延长和天球相交的两点叫做天极。在北半球的叫北天极,在南半球的叫南天极(2)[horizon the ends of the earth]天边;天际
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更新时间:2026/6/8 6:57:30