注音符號與漢語拼音對照
https://www.youtube.com/watch?v=O1vofW5_gnY
汉语拼音 song
https://www.youtube.com/watch?v=jkVKm6eDX2c
tone practice
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注音符號與漢語拼音對照
https://www.youtube.com/watch?v=O1vofW5_gnY
汉语拼音 song
https://www.youtube.com/watch?v=jkVKm6eDX2c
tone practice
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