a graphic representation showing the relative performance of individuals as measured against each other,used especially as a method of grading students in which the assignment of grades is based on predetermined proportions of students

• 成绩分布曲线，一种用来显示个人与他人比较时相对表现的图示，尤指用作给学生分等级的方法，这种分级法是建立在预先确定的学生比例之上的