青蛙大嘴上腭中间有一排细小牙齿，不用来咀嚼食物，而防食物从口中滑出或跑掉。

来源: 无牙于 2011-07-31 16:21:18 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.