单词 diphthongation 释义 diphthongation rare—0.[f. diphthong v.: see -ation. Cf. mod.F. diphthongaison.]= diphthongization.In mod. Dicts.{var l=document.getElementsByTagName("link");var r=/OED4.css$/;for(var i=l.length-1;i>=0;i--)with(l[i].href){var m=m...