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Pinyin Lesson 10 Finals ao ou iu |
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[ao] is compound final. The former vowel is more open, longer and louder while the latter one is narrow, short, weak and blurred. It is imperative to havea natural glide but not a sudden change from the former to the latter. |

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[ou] is compound final. The former vowel is more open, longer and louder while the latter one is narrow, short, weak and blurred. It is imperative to havea natural glide but not a sudden change from the former to the latter. |

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[iu] is compound final. The former vowel is more open, longer and louder while the latter one is narrow, short, weak and blurred. It is imperative to havea natural glide but not a sudden change from the former to the latter. |
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