diphthong是什么意思音标:英 [ˈdɪfθɒŋ]美 [ˈdɪfˌθɒŋ, -ˌθɑŋ, ˈdɪp-]

n. 二合元音, 复合元音, 元音连字
[电] 二重母音

n. a vowel sound that starts near the articulatory position for one vowel and moves toward the position for another