单词：monophthong
音标：['mɒnәfθɒŋ] ；
n. 单元音
n. A single uncompounded vowel sound.
n. A combination of two written vowels pronounced as one;
a digraph.
n. A combination of two written vowels pronounced as one;
a digraph.
词型变化：名词复数形式 : monophthongs