grader
/ˈgreɪdə(r)/noun
1
- a person or thing that grades评分者; 评分物。
1.1
- a wheeled machine for levelling the ground, especially in making roads（尤指铺路时的）平路机。
2
- in combination N. Amer. a pupil of a specified grade in a school〈北美〉特定年级的学生：
first-grader.
一年级学生。