n.（评分）等级；技巧水平；阶段（名词grade的复数形式）

v.分级；评分；渐次变化（grade的第三人称单数形式）

I wonder what I can do about improving my grades. 我不知道能用什么办法提高自己的学习成绩。

Low grades are getting Hellen down. 低分数使海伦闷闷不乐。

Pupils who pass the test will be promoted to the next higher grade. 小学生只要考试及格就会升到高年级。

Low grades are get ting Helen down. 考分很低使海纶闷闷不乐。

He's not in the first grade as a musician. 他不是第一流的音乐家。