資料來源 : pyDict

定等級的人;平地機..年級生

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Grader \Grad"er\, n.
   One who grades, or that by means of which grading is done or
   facilitated.

資料來源 : WordNet®

grader
     n : a judge who assigns grades to something