grad.er
n.（名词）One that grades, especially:特指分类者：One who grades students` work.阅卷评分者：给学生作业判分的人A piece of heavy equipment used to level or smooth road or other surfaces to the desired gradient.压路机：用来平整道路或其它表面以达到预期的坡度的一种重型设备A student in a specified class in an elementary or high school. Often used in combination:…年级学生：小学或高中某个班级的学生，常用于复合词：例句：tenth graders.十年级学生
