发音要领Essentials of Pronunciation
ang:是鼻韵母。[-ng]是舌根鼻音韵尾，也叫后鼻音韵尾。发完元音，紧接着将舌后缩，舌根抵向软腭，使气流从鼻腔出来。
Nasal finals. [-ng] is a velar nasal consonant, or a back nasal consonant. These nasal finals are pronounced by drawing back the tongue and pressing its back against the soft palate as soon as the vowel is produced to release the air through the nose.

发音要领Essentials of Pronunciation
eng:是鼻韵母。[-ng]是舌根鼻音韵尾，也叫后鼻音韵尾。发完元音，紧接着将舌后缩，舌根抵向软腭，使气流从鼻腔出来。
Nasal finals. [-ng] is a velar nasal consonant, or a back nasal consonant. These nasal finals are pronounced by drawing back the tongue and pressing its back against the soft palate as soon as the vowel is produced to release the air through the nose.

发音要领Essentials of Pronunciation
ing:是鼻韵母。[-ng]是舌根鼻音韵尾，也叫后鼻音韵尾。发完元音，紧接着将舌后缩，舌根抵向软腭，使气流从鼻腔出来。
Nasal finals. [-ng] is a velar nasal consonant, or a back nasal consonant. These nasal finals are pronounced by drawing back the tongue and pressing its back against the soft palate as soon as the vowel is produced to release the air through the nose.

发音要领Essentials of Pronunciation
ong:是鼻韵母。[-ng]是舌根鼻音韵尾，也叫后鼻音韵尾。发完元音，紧接着将舌后缩，舌根抵向软腭，使气流从鼻腔出来。
Nasal finals. [-ng] is a velar nasal consonant, or a back nasal consonant. These nasal finals are pronounced by drawing back the tongue and pressing its back against the soft palate as soon as the vowel is produced to release the air through the nose.