练声这事要感谢杨毛头，她在一年多前回南山碧竹的帖子时无私分享了Jeff Rolka在油管的练声频道！：）

来源: 无问东西于 2022-02-28 12:26:25 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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