| 单词 | diphthongs |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔diphthong〕The sounds of “ou” in “out” and of “oy” in “boy” are diphthongs.单词out中的ou和单词boy中的oy都发双元音。韦氏高阶〔smooth breathing〕The symbol ( ’ ) written over some initial vowels and diphthongs in ancient Greek to indicate that a word does not begin with the sound (h).不送气符号：在古希腊语中标于起始单元音或双元音上的符号(')，表示此单词不以(h)音作为开头美国传统 |
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