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      <title>二十四节气与农事历法的形成</title>
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      <description><![CDATA[从黄河流域的物候观察到《淮南子·天文训》的完整记载，二十四节气如何成为指导农事的历法骨架。]]></description>
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      <description><![CDATA[十天干与十二地支如何组合成六十甲子，又为何能循环记录年月日时。]]></description>
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      <title>立春为何被视作岁首</title>
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      <description><![CDATA[农历新年与节气立春并不总是重合，其中的历法分歧延续了两千余年。]]></description>
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      <title>农历闰月的置闰规则</title>
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      <description><![CDATA[十九年七闰并非精确规则，无中气置闰才是现行农历的判定依据。]]></description>
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      <description><![CDATA[梳理四柱八字（子平术）的起源与演变：从唐代李虚中的三柱法、宋代徐子平加入时辰，到明清《滴天髓》《三命通会》等经典，以及传统子平派、新派、盲派的差异。]]></description>
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      <description><![CDATA[一日百刻与十二时辰并行的两套计时体系，以及它们在历书中的实际用法。]]></description>
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      <description><![CDATA[秋分与望月之间，八月十五是如何被固定下来的。]]></description>
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      <pubDate>Thu, 17 Sep 2026 16:00:00 GMT</pubDate>
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      <description><![CDATA[从《大明历》到《授时历》，古人如何逐步逼近回归年的精确长度。]]></description>
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      <description><![CDATA[五行并非简单的相生相克，其与天干地支的对应也有历史演变。]]></description>
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      <title>白露与秋分的物候差异</title>
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      <description><![CDATA[同处仲秋，两个节气在黄河流域的物候指向并不相同。]]></description>
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      <title>《三统历》的历元设定</title>
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      <description><![CDATA[汉代历法如何确定历元，以及这一设定对后世的长期影响。]]></description>
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      <description><![CDATA[七夕并非固定日期的节日，其日期确定依赖牵牛织女星的观测。]]></description>
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      <description><![CDATA[十天干与十二地支的最小公倍数为六十，这一结构决定了甲子循环。]]></description>
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      <description><![CDATA[郭守敬测算的回归年长度与今值仅差 26 秒，其方法值得细看。]]></description>
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      <description><![CDATA[周代以冬至为岁首，这一传统在后世历法改革中被逐步取代。]]></description>
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      <description><![CDATA[六十甲子各有纳音，其推演规则源自何处、又如何被使用。]]></description>
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