Why get upset just because you got one bad grade?
何必因为一次成绩不好就想不开呢？
All the materials used were of the highest grade.
使用的材料全是优质品。
You get an A grade for scores of 75 and over.
75分及75以上的分数就是优等。
Your grade will be based on four papers and a final exam.
你的成绩将根据四篇论文和期末考试决定。
A high proportion of candidates get low or unclassified grades.
有很大一部分考生得分很低甚或不获评分。