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(xué)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(xué)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(jī)：用來平整道路或其它表面以達(dá)到預(yù)期的坡度的一種重型設(shè)備
A student in a specified class in an elementary or high school. Often used in combination:
…年級學(xué)生：小學(xué)或高中某個(gè)班級的學(xué)生，常用于復(fù)合詞：
例句：
tenth graders.
十年級學(xué)生