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

This is a course, a version of which I've taught almost every year for the last twenty years and it evolves a little bit every year.

诚如你们所见,在过去二十年中,几乎每年我都要讲授这门课,这门课程每年都会与时俱进

耶鲁公开课 - 生物医学工程探索课程节选