It also meant that the better schools could receive mediocre grades becausethey were already performing well and had little room for improvement.

同时这还意味原本更优秀的学校却只能获得平凡的等级评价，因为他们的进步空间相对小得多。

youdao

The mediocre person answers only 30% of the questions correctly admits that he has only average grades he worked on the yearbook as a proofreader and he tried out for the track team but didn't make it.

后者回答正确30%的问题,坦白学习成绩一般,给年刊做校对,尝试参加校田径运动队，但没成功。

耶鲁公开课 - 心理学导论课程节选

But blacks with good grades had fewer black friends than their mediocre peers.

ECONOMIST: Black America