常见例句A tooth with a broad crown used to grind food,located behind the premolars.臼齒一種用作研磨食物的有寬齒冠的位於前磨牙後的牙齒。Perhaps that's because the premolars were doing all the hard work, he suggests.他建議道，也許那是因爲前磨牙做著所有艱辛的工作。 返回 premolars