I've been here in MIT for thirty years, and in the early nineties I taught the large freshmen physics course, and electromagnetism.

我麻省理工工作三十年了，在上世纪九十年代初,我就开始给大一新生上物理课，以及电磁学。

麻省理工公开课 - 媒体、教育、市场课程节选

There was... a few years there, I think, in the early nineties,

我想在几年前，也就是九十年代初，

对纽约的印象 - SpeakingMax英语口语达人

Particularly the course I taught in the early nineties have 600 students there.

尤其是我在九十年代讲的物理课,有600多个学生。

麻省理工公开课 - 媒体、教育、市场课程节选