開合- 維基百科，自由的百科全書 - Wikipedia
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開合是一個漢語音韻學術語，是「開口」和「合口」的合稱[1]:212。
若某字[注 1]在中古漢語語音中沒有介音[.mw-parser-output .IPA{font-family:"Charis SIL","Doulos SIL","Linux Libertine","Segoe UI","Lucida Sans Unicode","Code2000","Gentium","Gentium Alternative","TITUS Cyberbit Basic","Arial Unicode MS","IPAPANNEW","Chrys
