Fortunately, some fishes can change their secondary teeth to match a new diet over several years.

幸运的是，有些鱼类能在几年的时间内将第二组牙齿换新，以配合新的饮食。

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.

大多数成年人有 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。