2026.07.30《40天的三伏：2026加长版》

2026年7月15日入伏，8月23日出伏，整整40天，比去年多出10天。为什么有的年份30天、有的年份40天？三伏天又是怎么算出来的？今天聊聊这个“加长版”三伏天的来历，以及为什么它总是一年中最热的时候。前往小宇宙评论区与主播互动

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2026.07.30《40天的三伏：2026加长版》

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