甲等的英文：
grade-A

Superior grade rating, as of bonds, credit risks, or student's work.
【美】优等;甲等

Grade A potatoes are the best in quality.
甲等马铃薯是质量最好的.

Though often represented as fully armed, helmet and breastplate and all that, she favoured patriotic defense
尽管雅典娜总是被描述成全副武装，头戴钢盔，身穿护胸甲等,但她只提倡为保卫祖国而战。

longitudinal grade
纵坡度

There are lots of jobs in junior grades.
初级阶段有很多工作要做。

Red grades into pink.
红色逐渐变成粉红色。

The teachers are grading the papers.
老师们正在给卷子打分数。

Pencils are graded according to softness.
铅笔根据硬度分类。