名詞 grader:

1. a judge who assigns grades to something

1. A playground foaming with third graders.
   操場上聚滿了三年級學生

grad.er

n.（名詞）
One that grades, especially:
特指分類者：
One who grades students` work.
閱卷評分者：給學生作業(yè)判分的人
A piece of heavy equipment used to level or smooth road or other surfaces to the desired gradient.
壓路機：用來平整道路或其它表面以達到預期的坡度的一種重型設備
A student in a specified class in an elementary or high school. Often used in combination:
…年級學生：小學或高中某個班級的學生，常用于復合詞：
例句：
tenth graders.
十年級學生