单词	premolar
释义	premolar /priːˈməʊlə / noun A tooth situated between the canine and the molar teeth. An adult human normally has eight, two in each jaw on each side.The normal permanent dentition comprises four incisors, two canines, four premolars, and six molars in each jaw.... The well-preserved teeth - incisors, canines, premolars, and molars - look to have been ideal for feeding on fish and aquatic invertebrates, somewhat like the teeth of modern seals. It is common knowledge that the tongue partly rests between the bones that form the jaw, and to be more precise, between the dental rows (incisors, canines, premolars and molars) and on the floor of the mouth.
随便看	old-fashioned winter old fella old fellow old field old field birch old-field mouse old field pine old-field school old flame old fogey old fogeydom old fogeyish old fogeyism old folk old folks' home Old Fourlegs Old French Old Frisian old fruit old fustic old gang old gentleman old gentlemanly old girl Old Glory

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。