tartar

剑桥词典

tartar noun (SUBSTANCE)

[ 不可数或单数名词：没有复数形式的名词 ]
a hard substance that forms on the teeth
牙石，牙垢

tartar noun (PERSON)

[ 可数名词：有复数形式的名词 ] old-fashioned disapproving
a person who is often angry and unkind
凶暴的人，凶悍的人 返回 tartar