差等生英语怎么说

差等生的英文是"mediocre student"，来源是拉丁语中的"mediocris"，意为"中等的，普通的"。例句：
John was always a mediocre student.
约翰一直是个差等生。
She was never satisfied with being a mediocre student.
她从不满足于成为一个差等生。
Despite his mediocre grades, he was accepted into a prestigious university.
尽管他成绩平平，他还是被一所名牌大学录取了。