premolar

例句：

1. 1. The dentist removed the premolar to save the patient's time.
   牙医拔除了一颗前磨牙，节省了患者的时间。
2. 2.The patient was advised to visit the dentist for a check-up before the premolar erupted.
   患者被建议在前磨牙长出之前去看牙医做检查。
3. 3. The dentist explained that the premolar is an important part of the teeth and should be taken care of properly.
   牙医解释说，前磨牙是牙齿的重要组成部分，应该得到妥善照顾。