一口舌的“舌”字,在《广韵》系统中属船母薛韵,其上古韵部古音学家一般都归月部。从《诗》韵来看,《大东》篇“舌”“揭”为韵,《抑》篇“舌”“逝”为韵,《烝民》篇“舌”“外”“发”为韵,“舌”字归月部显然没有问题。不过,在字书中“舌”声系的字却明显地分成两个不同的语音 Tongue “tongue ” character, in the “Guangyun” system is the mother of the ship Xue Yun, the ancient rhyme Department of ancient phonologists generally go to the moon. From the poem rhyme point of view, “Dadong” “tongue” “expose ” is rhyme, “repressed” articles tongue Tongue “” outside “” hair “is rhyme, ” tongue “the word to the moon apparently no problem. However, the word ”tongue" in a book is clearly divided into two different sounds