https://icelemon.top/tags/%E9%92%A2%E7%90%B4/Recent content in 钢琴 on BlogHugozh-CNSat, 31 Oct 2026 00:00:00 +0800https://icelemon.top/knowledge/why-piano-keys-repeat-in-sevens-and-fives/Sat, 31 Oct 2026 00:00:00 +0800https://icelemon.top/knowledge/why-piano-keys-repeat-in-sevens-and-fives/从全音与半音看懂黑键的两两、三三分组，再用弦长、五度链和实际计算分清音阶、调律与星形图。