A broad ridged tooth in mammals that is situated behind the canine teeth (when present) and in front of the molars. Premolars are adapted for grinding and chewing food and are present in both the deciduous and permanent teeth.
科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。