There are four premolars on top and four on the bottom.
上有四颗前磨牙,下有四颗。
Most adults have 32 teeth called permanent or secondary teeth; 8 incisors, 4 canines, also called cuspids, 8 premolars, also called bicuspids, 12 molars, including 4 wisdom teeth whereas children have 20 teeth.
大数成年人有 32 颗牙齿,称为恒牙或副牙;8 颗门牙,4 颗尖牙也叫犬牙,8 颗前磨牙,也称为双尖牙,12 颗臼齿,包括 4 颗智齿,而儿童有 20 颗牙齿。