Not all college teachers are full professors.

VOA: special.2009.04.09

He had written a large handful of college exercises and assignments in Latin, and he had obviously made a favorable impression on his teachers, one of whom, at least, he stayed in touch with for years.

他用拉丁文写过大量练习,和作业，很显然，他也给老师留下了良好的印象，他还跟其中的一位老师保持了很多年的联系。

耶鲁公开课 - 弥尔顿课程节选

He had written a large handful of college exercises and assignments in Latin, and he had obviously made a favorable impression on his teachers, one of whom, at least, he stayed in touch with for years.

他用拉丁文写过大量练习,和作业，很显然，他也给老师留下了良好的印象，他还跟其中的一位老师保持了很多年的联系。

耶鲁公开课 - 弥尔顿课程节选